From 01116b01fe0b4ff549d0394b4494bd8d014a79fa Mon Sep 17 00:00:00 2001
From: CrispyPin <crispin@tasa.se>
Date: Sat, 9 Dec 2023 22:55:14 +0100
Subject: [PATCH] Completed: 1, 2, 3, 4, 5.1, 6.1, 7, 8

---
 bf/day_01.bf        |   92 ++++
 day_01/1.txt        | 1000 ++++++++++++++++++++++++++++++++++++
 day_01/Cargo.lock   |    7 +
 day_01/Cargo.toml   |    8 +
 day_01/day_01.c     |   25 +
 day_01/input.txt    | 1000 ++++++++++++++++++++++++++++++++++++
 day_01/rustfmt.toml |    1 +
 day_01/src/main.rs  |   80 +++
 day_02/2.txt        |  100 ++++
 day_02/Cargo.lock   |    7 +
 day_02/Cargo.toml   |    8 +
 day_02/rustfmt.toml |    1 +
 day_02/src/main.rs  |   68 +++
 day_03/3.txt        |  140 +++++
 day_03/Cargo.lock   |    7 +
 day_03/Cargo.toml   |    8 +
 day_03/out.txt      | 1191 +++++++++++++++++++++++++++++++++++++++++++
 day_03/rustfmt.toml |    1 +
 day_03/src/main.rs  |   80 +++
 day_04/Cargo.lock   |    7 +
 day_04/Cargo.toml   |    8 +
 day_04/input.txt    |  198 +++++++
 day_04/rustfmt.toml |    1 +
 day_04/src/main.rs  |   86 ++++
 day_05/Cargo.lock   |    7 +
 day_05/Cargo.toml   |    8 +
 day_05/input.txt    |  226 ++++++++
 day_05/rustfmt.toml |    1 +
 day_05/src/main.rs  |   63 +++
 day_06/Cargo.lock   |   35 ++
 day_06/Cargo.toml   |    9 +
 day_06/input.txt    |    2 +
 day_06/rustfmt.toml |    1 +
 day_06/src/main.rs  |   57 +++
 day_07/Cargo.lock   |    7 +
 day_07/Cargo.toml   |    8 +
 day_07/input.txt    | 1000 ++++++++++++++++++++++++++++++++++++
 day_07/rustfmt.toml |    1 +
 day_07/src/main.rs  |  130 +++++
 day_08/Cargo.lock   |   92 ++++
 day_08/Cargo.toml   |    9 +
 day_08/input.txt    |  760 +++++++++++++++++++++++++++
 day_08/rustfmt.toml |    1 +
 day_08/src/main.rs  |   46 ++
 44 files changed, 6587 insertions(+)
 create mode 100644 bf/day_01.bf
 create mode 100644 day_01/1.txt
 create mode 100644 day_01/Cargo.lock
 create mode 100644 day_01/Cargo.toml
 create mode 100644 day_01/day_01.c
 create mode 100644 day_01/input.txt
 create mode 100644 day_01/rustfmt.toml
 create mode 100644 day_01/src/main.rs
 create mode 100644 day_02/2.txt
 create mode 100644 day_02/Cargo.lock
 create mode 100644 day_02/Cargo.toml
 create mode 100644 day_02/rustfmt.toml
 create mode 100644 day_02/src/main.rs
 create mode 100644 day_03/3.txt
 create mode 100644 day_03/Cargo.lock
 create mode 100644 day_03/Cargo.toml
 create mode 100644 day_03/out.txt
 create mode 100644 day_03/rustfmt.toml
 create mode 100644 day_03/src/main.rs
 create mode 100644 day_04/Cargo.lock
 create mode 100644 day_04/Cargo.toml
 create mode 100644 day_04/input.txt
 create mode 100644 day_04/rustfmt.toml
 create mode 100644 day_04/src/main.rs
 create mode 100644 day_05/Cargo.lock
 create mode 100644 day_05/Cargo.toml
 create mode 100644 day_05/input.txt
 create mode 100644 day_05/rustfmt.toml
 create mode 100644 day_05/src/main.rs
 create mode 100644 day_06/Cargo.lock
 create mode 100644 day_06/Cargo.toml
 create mode 100644 day_06/input.txt
 create mode 100644 day_06/rustfmt.toml
 create mode 100644 day_06/src/main.rs
 create mode 100644 day_07/Cargo.lock
 create mode 100644 day_07/Cargo.toml
 create mode 100644 day_07/input.txt
 create mode 100644 day_07/rustfmt.toml
 create mode 100644 day_07/src/main.rs
 create mode 100644 day_08/Cargo.lock
 create mode 100644 day_08/Cargo.toml
 create mode 100644 day_08/input.txt
 create mode 100644 day_08/rustfmt.toml
 create mode 100644 day_08/src/main.rs

diff --git a/bf/day_01.bf b/bf/day_01.bf
new file mode 100644
index 0000000..f7a3765
--- /dev/null
+++ b/bf/day_01.bf
@@ -0,0 +1,92 @@
+
+first_digit last_digit t0 t1 t2 t3 t4 out0 out1 t7
+
+>>
+marker at t7
+>>>> >>>+<<<< <<
+, read first char into t1
+[ main char loop (loop until zero/end)
+	move char to t0 and t4
+	[-<+>>>>+<<<]
+	goto t0
+	subtract 48=8x6 from char(t0) using t1 temporarily
+	++++ ++++[<------>-]<
+	move char to t1 and t2
+	[->+>+<<]
+	++++ ++++ ++ 10 in t0
+	subtract 10 from t1 and store the difference in t4
+	if t4 is not zero then this is a digit
+	[- loop on t0(10)
+		>- dec t1
+		assume t1 reached zero
+		move loop counter t0 to t3
+		<[->>>+<<<]>
+		[t1 still not zero
+			undo loop counter reset from t3
+			>>[-<<<+>>>]<<
+			>>> >>> goto t7 to escape
+		]
+		>>> >>> goto t7
+		-[+<-]+ go left until a cell with 1 (should be t7)
+		<<< <<< return to t1
+
+	return to t0 <
+	]
+	>>> goto t3
+	if t3 is 0 then the character was not a digit so return (it never got reset by the previous loop)
+	[ character is a digit (value is in t2)
+		[-] reset t3
+		<<<<
+		[-]reset last_digit
+		<
+		if first_digit is set
+		[
+			>>>> goto t2
+			move t2 to last_digit
+			[-<<<+>>>]
+			>>>>>> goto t8 to escape
+		]
+		>>>>>>>>> goto t7 or higher
+		-[+<-]+ go left until a cell with 1 ( t7)
+		<<<<< go back to t2
+		copy t2 to last_digit and first_digit x10
+		[-<<<+<++++ ++++ ++>>>>]
+		> goto t3
+	]
+	<<[-] reset t1
+	>>> goto t4
+	---- ---- -- subtract 10 (value of LF)
+	<+> mark t3 that LF is reached
+	if there is something here still then its not a newline
+	[
+		<-> cancel mark on t3
+		dump contents of t4 to exit this scope
+		[-]
+	]
+	<goto t3
+	[ LF is reached
+		[-] remove mark on t3
+		<<<< goto last_digit
+		combine digits into last_digit
+		<[->+<]>
+		add to output:
+		[while sum
+			-
+			>>>>>>>+ inc lower (second) byte
+			<+> do carry
+			[lower byte not zero so cancel the carry
+				<->
+				escape to t8
+				>>
+			]
+			>goto t7 or t9
+			-[+<-]+ go left until t7 (=1)
+			<<<<<<<< goto sum(last_digit)
+		]
+		>>>> goto t3
+	]
+	reset t2 and t1
+	<[-]<[-]
+	, next char
+]
+
diff --git a/day_01/1.txt b/day_01/1.txt
new file mode 100644
index 0000000..216d4b9
--- /dev/null
+++ b/day_01/1.txt
@@ -0,0 +1,1000 @@
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diff --git a/day_01/Cargo.lock b/day_01/Cargo.lock
new file mode 100644
index 0000000..779339e
--- /dev/null
+++ b/day_01/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_01"
+version = "0.1.0"
diff --git a/day_01/Cargo.toml b/day_01/Cargo.toml
new file mode 100644
index 0000000..d142257
--- /dev/null
+++ b/day_01/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day_01"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day_01/day_01.c b/day_01/day_01.c
new file mode 100644
index 0000000..8a10a45
--- /dev/null
+++ b/day_01/day_01.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+int main() {
+  char c = 0;
+  unsigned int first_digit = 0;
+  unsigned int last_digit = 0;
+  unsigned int sum = 0;
+  while (c != EOF) {
+    c = getchar();
+    // putchar(c);
+    unsigned char possible_digit = c - 48;
+    if (possible_digit < 10) {
+      //   printf("%d\n", possible_digit);
+      if (first_digit == 0) {
+        first_digit = possible_digit * 10;
+      }
+      last_digit = possible_digit;
+    } else if (c == 10) {
+      sum += first_digit + last_digit;
+      first_digit = 0;
+      last_digit = 0;
+    }
+  }
+  printf("%d", sum);
+}
\ No newline at end of file
diff --git a/day_01/input.txt b/day_01/input.txt
new file mode 100644
index 0000000..216d4b9
--- /dev/null
+++ b/day_01/input.txt
@@ -0,0 +1,1000 @@
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diff --git a/day_01/rustfmt.toml b/day_01/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/day_01/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/day_01/src/main.rs b/day_01/src/main.rs
new file mode 100644
index 0000000..ae5ff88
--- /dev/null
+++ b/day_01/src/main.rs
@@ -0,0 +1,80 @@
+use std::fs;
+
+fn main() {
+	// for _ in 0..1000 {
+	// 	a();
+	// }
+	a();
+	b();
+}
+
+fn a() {
+	/*
+	let data = include_str!("../1.txt");
+	let sum: i32 = data
+		.lines()
+		.map(|line| {
+			let nums: Vec<_> = line.chars().filter(|c| c.is_numeric()).collect();
+			let mut num = nums[0].to_string();
+			num.push(*nums.last().unwrap());
+			num.parse::<i32>().unwrap()
+		})
+		.sum();
+	println!("{sum:?}");
+	*/
+
+	let bytes = fs::read("input.txt").expect("input.txt not found");
+	let mut sum = 0;
+	let mut first_digit = 0;
+	let mut last_digit = 0;
+	for byte in bytes {
+		if byte <= b'9' && byte > b'0' {
+			let digit = byte - 48;
+			last_digit = digit;
+			if first_digit == 0 {
+				first_digit = digit * 10;
+			}
+		} else if byte == b'\n' {
+			sum += last_digit as u16;
+			sum += first_digit as u16;
+			last_digit = 0;
+			first_digit = 0;
+		}
+	}
+	println!("{sum}");
+}
+
+fn b() {
+	let data = include_str!("../1.txt");
+
+	let sum: i32 = data
+		.lines()
+		.map(|line| {
+			let mut digits = Vec::new();
+			for i in 0..line.len() {
+				let c = line.chars().nth(i).unwrap();
+				if c.is_numeric() {
+					digits.push(c);
+				} else {
+					for (digit, &text) in [
+						"one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
+					]
+					.iter()
+					.enumerate()
+					.map(|(i, t)| ((i + 1).to_string().chars().next().unwrap(), t))
+					{
+						if line[i..].starts_with(text) {
+							digits.push(digit);
+							break;
+						}
+					}
+				}
+			}
+
+			let mut num = digits[0].to_string();
+			num.push(*digits.last().unwrap());
+			num.parse::<i32>().unwrap()
+		})
+		.sum();
+	println!("{sum:?}");
+}
diff --git a/day_02/2.txt b/day_02/2.txt
new file mode 100644
index 0000000..db9f4bb
--- /dev/null
+++ b/day_02/2.txt
@@ -0,0 +1,100 @@
+Game 1: 10 green, 9 blue, 1 red; 1 red, 7 green; 11 green, 6 blue; 8 blue, 12 green
+Game 2: 11 red, 7 green, 3 blue; 1 blue, 8 green, 5 red; 2 red, 12 green, 1 blue; 10 green, 5 blue, 7 red
+Game 3: 2 red, 7 green, 1 blue; 1 blue, 8 red; 7 green, 19 red, 5 blue; 1 blue, 10 green, 18 red; 10 red, 6 blue, 4 green
+Game 4: 2 blue, 5 green, 2 red; 7 red, 3 green; 3 blue, 2 red; 16 green, 2 blue
+Game 5: 1 blue, 9 red; 5 blue, 9 green, 6 red; 8 red, 10 blue, 3 green; 3 red, 13 green, 4 blue; 5 green, 9 red, 6 blue; 4 green, 8 red, 7 blue
+Game 6: 1 red, 2 green; 2 red, 1 blue; 5 red, 10 green, 2 blue; 1 blue, 2 green, 3 red; 1 red, 6 green
+Game 7: 9 blue, 14 green, 5 red; 10 green, 8 blue, 2 red; 20 green, 1 red; 4 blue, 17 green, 4 red
+Game 8: 16 blue, 16 green, 8 red; 16 blue, 6 red, 10 green; 13 blue, 8 green, 16 red; 10 red, 13 green, 13 blue
+Game 9: 8 blue, 10 green, 4 red; 18 green, 14 blue, 12 red; 4 green, 10 blue, 17 red; 16 red, 6 blue, 5 green; 11 red, 9 blue; 16 green, 13 red, 7 blue
+Game 10: 5 green, 2 red, 13 blue; 3 red, 2 green, 17 blue; 3 green, 12 blue, 15 red; 7 blue, 14 red; 3 red, 4 green, 17 blue
+Game 11: 8 green, 10 blue, 15 red; 11 blue, 4 green, 3 red; 10 blue, 4 green, 5 red; 7 blue, 1 green, 4 red; 2 red, 9 blue; 18 red, 8 green, 2 blue
+Game 12: 16 red, 10 green; 12 red, 8 blue, 3 green; 8 red, 10 green, 7 blue; 10 green, 12 red
+Game 13: 5 green, 2 red; 13 blue, 4 green, 4 red; 8 blue, 4 green
+Game 14: 9 green, 3 red, 1 blue; 1 blue, 3 red, 1 green; 6 green; 3 green, 5 red; 1 blue, 4 red
+Game 15: 13 red, 2 blue, 7 green; 6 green, 4 red, 7 blue; 8 blue, 11 red, 4 green; 1 green, 7 blue, 10 red; 3 blue, 9 green, 6 red; 6 green, 11 red, 1 blue
+Game 16: 1 red, 14 green; 4 green, 1 blue, 4 red; 3 red, 1 blue, 5 green; 5 red, 1 blue, 14 green; 1 blue, 1 red, 12 green; 6 red, 14 green, 1 blue
+Game 17: 14 green, 14 red; 19 green, 3 blue, 10 red; 4 green, 10 red, 1 blue
+Game 18: 9 green, 1 blue, 12 red; 1 green, 10 red; 1 blue, 3 red
+Game 19: 6 blue, 3 red, 3 green; 12 blue; 11 red, 14 blue, 3 green; 14 blue, 13 red, 1 green; 5 blue, 9 red
+Game 20: 10 blue, 11 green, 3 red; 2 red, 16 green; 6 blue, 16 green, 4 red; 14 green, 7 red, 1 blue; 5 red, 9 blue, 11 green
+Game 21: 1 red; 4 red; 2 red, 2 green, 1 blue
+Game 22: 11 green, 3 blue, 3 red; 12 blue, 6 green; 1 red, 5 blue, 1 green; 9 blue, 6 green; 10 green, 1 red, 8 blue
+Game 23: 13 blue, 3 green; 3 red, 5 green, 6 blue; 2 red, 11 green, 9 blue
+Game 24: 1 blue, 1 green; 1 blue; 1 red
+Game 25: 7 red, 1 green, 14 blue; 17 blue, 4 red, 6 green; 7 blue, 5 red; 2 red, 6 green, 20 blue
+Game 26: 10 green, 8 red, 11 blue; 13 green, 2 blue, 4 red; 1 blue, 6 green, 9 red
+Game 27: 9 green, 1 blue, 6 red; 7 red, 14 green; 13 green, 2 red; 2 red, 13 green; 2 green, 7 red
+Game 28: 10 red, 6 green; 7 green, 11 red, 1 blue; 8 red, 5 green; 10 green, 13 red; 17 red, 3 green
+Game 29: 4 blue, 3 red, 13 green; 9 green, 2 red, 1 blue; 11 green, 5 blue, 2 red; 1 blue, 7 green, 2 red; 4 blue, 1 red, 12 green
+Game 30: 6 blue, 1 green, 3 red; 1 green, 3 red, 1 blue; 6 green, 2 red, 2 blue
+Game 31: 11 red; 5 red, 2 green; 3 green, 6 red, 1 blue; 1 green, 18 red; 2 green, 14 red
+Game 32: 11 blue, 12 green, 11 red; 5 red, 14 blue, 5 green; 5 blue, 7 green, 18 red
+Game 33: 8 blue, 4 green, 11 red; 14 blue, 11 red, 3 green; 3 green, 1 blue; 17 red, 2 green, 9 blue; 7 green, 7 blue, 3 red; 2 green, 3 red, 7 blue
+Game 34: 1 blue, 17 green; 2 blue, 1 red, 10 green; 10 green, 1 red; 6 green, 1 red, 1 blue; 2 green, 2 blue, 1 red
+Game 35: 1 blue, 5 red, 5 green; 4 blue, 3 green, 8 red; 5 green, 14 blue; 5 green, 4 blue, 14 red
+Game 36: 13 green, 7 red, 2 blue; 2 red, 2 green; 1 red, 12 green; 7 green, 8 red
+Game 37: 11 red, 4 green, 1 blue; 12 red, 3 green, 5 blue; 1 blue, 12 red, 1 green; 9 red, 10 green; 7 red, 2 blue, 5 green; 7 green, 1 red, 4 blue
+Game 38: 14 red, 20 blue, 6 green; 14 red, 12 green, 13 blue; 10 green, 10 red, 9 blue; 9 green, 9 blue, 15 red
+Game 39: 4 blue; 8 green, 7 blue; 12 green, 2 blue, 5 red; 2 blue, 3 green, 3 red; 5 red, 1 green, 1 blue; 6 red, 1 blue
+Game 40: 7 green, 10 red, 3 blue; 2 blue, 1 red, 7 green; 2 red, 5 blue, 11 green; 4 blue, 12 red, 6 green; 13 green, 7 blue, 9 red; 14 blue, 7 green, 8 red
+Game 41: 14 red, 17 blue, 3 green; 18 blue, 4 green, 17 red; 2 green, 17 red, 8 blue; 7 green, 13 blue, 6 red
+Game 42: 1 blue, 16 green; 14 green; 17 blue, 4 green, 7 red; 6 red, 7 blue, 8 green
+Game 43: 8 red, 15 blue; 8 red, 1 green, 11 blue; 17 blue, 3 red
+Game 44: 10 red, 2 green, 11 blue; 8 green, 4 blue, 6 red; 6 green, 2 blue, 10 red; 1 blue, 12 red, 7 green
+Game 45: 1 blue, 4 red, 4 green; 2 red, 5 green; 3 green, 6 blue, 1 red; 12 blue, 1 red, 2 green
+Game 46: 2 blue; 1 red, 4 blue; 2 blue, 15 red; 3 blue, 4 green, 5 red; 4 green, 13 red; 1 blue, 3 green, 9 red
+Game 47: 13 blue, 2 green, 2 red; 2 green, 12 blue, 3 red; 2 green, 1 blue
+Game 48: 1 blue, 4 green, 11 red; 2 blue, 5 red, 8 green; 6 red
+Game 49: 1 red, 10 green; 3 green, 8 blue, 5 red; 7 red, 5 green, 7 blue
+Game 50: 12 blue, 5 green, 1 red; 7 blue, 2 red; 12 blue, 3 green; 16 blue; 1 blue, 3 green; 2 red, 14 blue, 11 green
+Game 51: 6 blue, 15 red, 1 green; 15 red, 2 blue, 1 green; 12 red, 2 green
+Game 52: 5 green, 11 blue, 5 red; 18 green, 4 red, 10 blue; 14 green, 8 blue, 8 red; 2 red, 9 green, 11 blue; 9 blue, 5 red, 10 green
+Game 53: 1 red, 1 green; 2 green, 1 red, 2 blue; 2 green, 1 blue
+Game 54: 4 blue, 3 red, 7 green; 4 blue, 13 green; 1 red, 2 green, 7 blue; 5 blue, 5 red, 17 green
+Game 55: 8 red, 11 green, 11 blue; 1 green, 15 blue, 6 red; 7 red, 8 blue, 11 green; 2 green, 1 red, 11 blue; 11 blue, 3 red; 3 red, 7 blue, 10 green
+Game 56: 13 blue, 3 green; 1 red, 1 green, 7 blue; 17 blue, 2 red; 3 blue, 4 green, 4 red
+Game 57: 9 green, 11 blue, 12 red; 13 red, 6 green, 1 blue; 4 blue, 1 green, 14 red; 11 red, 6 blue, 3 green
+Game 58: 7 green, 2 blue, 6 red; 1 red, 4 green; 1 blue, 8 green, 10 red
+Game 59: 3 green, 11 red, 3 blue; 1 blue, 5 red, 8 green; 10 green, 9 red; 5 green, 5 red, 1 blue; 4 green, 8 blue; 13 green
+Game 60: 2 blue, 11 green, 7 red; 5 red, 9 green, 2 blue; 3 blue, 2 red, 8 green; 6 red, 2 blue, 9 green; 5 red, 4 green, 2 blue; 6 red, 5 blue, 11 green
+Game 61: 7 blue, 5 green, 8 red; 12 blue, 1 red, 11 green; 15 blue, 14 red, 15 green; 14 red, 7 blue, 6 green; 9 blue; 3 green, 10 blue, 11 red
+Game 62: 8 red, 1 blue, 1 green; 2 red, 1 blue, 8 green; 11 blue, 15 red, 4 green; 1 red, 5 green, 2 blue; 15 green, 11 blue, 12 red
+Game 63: 6 red, 3 green, 7 blue; 8 red, 2 green; 4 green, 3 red, 4 blue; 6 blue, 3 red, 10 green; 4 blue, 6 red, 9 green; 8 blue, 10 green, 5 red
+Game 64: 1 blue, 9 red, 1 green; 17 red, 3 blue; 8 red, 2 green; 12 red, 8 blue
+Game 65: 15 blue, 2 red; 1 green, 14 blue; 10 green, 1 red, 10 blue; 10 green, 1 red, 12 blue; 13 blue, 1 green
+Game 66: 18 green, 3 red, 7 blue; 19 blue, 2 red; 5 red, 8 blue, 11 green; 1 red, 15 blue, 12 green; 13 blue, 6 green; 12 blue, 6 green
+Game 67: 1 blue, 2 green, 6 red; 7 red, 5 blue; 9 red, 13 blue, 5 green; 4 green, 4 blue, 5 red; 11 blue, 7 red; 3 blue, 9 red
+Game 68: 2 blue, 8 green, 16 red; 11 green, 13 blue; 6 red, 7 green, 1 blue; 4 green, 7 red, 8 blue
+Game 69: 7 green, 3 blue, 5 red; 11 green, 4 blue; 1 red, 15 green, 10 blue; 8 green, 12 blue, 4 red
+Game 70: 8 blue, 8 green; 4 blue, 1 red, 6 green; 1 green, 1 blue; 7 green, 4 blue
+Game 71: 7 red, 13 blue, 4 green; 2 blue, 11 red, 9 green; 14 blue, 6 green, 2 red; 10 red, 6 blue, 10 green
+Game 72: 1 blue, 9 green, 1 red; 4 blue, 6 green, 1 red; 1 red, 3 green, 3 blue; 10 green, 3 blue, 2 red; 3 blue, 1 red, 1 green; 3 green, 1 red, 3 blue
+Game 73: 4 green, 15 red, 6 blue; 1 green, 12 red; 2 green, 16 red; 1 green, 12 red, 2 blue; 6 red, 4 green, 2 blue; 19 red, 3 blue, 2 green
+Game 74: 14 green, 2 blue, 3 red; 13 green, 4 red; 3 green, 4 blue; 3 blue, 3 red; 2 red, 12 green; 3 blue, 3 green
+Game 75: 13 red, 10 blue, 1 green; 14 blue, 9 red, 2 green; 8 blue; 1 green, 13 red, 11 blue
+Game 76: 2 red, 8 blue, 12 green; 11 green, 2 red; 2 red, 2 blue, 10 green; 5 blue, 2 green; 3 red, 11 green, 8 blue
+Game 77: 4 blue, 8 red, 14 green; 15 green, 12 red, 5 blue; 8 red, 5 green, 1 blue
+Game 78: 8 red, 19 blue, 4 green; 18 blue, 2 red; 12 blue, 4 green, 8 red; 17 blue, 2 green, 9 red; 9 red, 10 blue, 1 green; 6 green, 9 blue, 1 red
+Game 79: 1 blue, 11 red, 2 green; 2 red, 2 green, 6 blue; 11 red, 2 blue, 2 green; 11 red, 2 green, 4 blue
+Game 80: 1 red, 9 blue; 1 red, 5 blue, 8 green; 5 green, 1 red, 4 blue; 2 green, 9 blue, 1 red; 7 blue, 1 green, 1 red
+Game 81: 1 green, 1 blue, 7 red; 3 blue, 7 green, 6 red; 5 green; 3 blue; 3 red, 4 blue, 1 green; 5 red, 9 green
+Game 82: 12 blue, 4 red, 4 green; 7 red, 4 blue; 3 green, 10 red, 3 blue; 6 blue, 13 red; 4 blue, 5 red, 1 green
+Game 83: 1 red, 1 green, 18 blue; 20 blue, 16 red, 1 green; 17 blue, 12 red; 1 green, 9 blue, 7 red
+Game 84: 6 blue, 7 green, 6 red; 6 red, 10 green, 1 blue; 5 red, 8 green; 13 green, 2 red, 7 blue
+Game 85: 1 blue, 7 red, 11 green; 1 red; 8 red, 10 green, 4 blue; 4 red, 11 green, 1 blue; 1 blue, 6 green
+Game 86: 9 green, 2 blue; 3 red, 1 green, 2 blue; 1 green, 5 blue, 9 red; 1 blue, 2 green; 9 red, 1 green, 4 blue
+Game 87: 15 red, 1 green, 16 blue; 1 green, 6 red, 17 blue; 7 red, 1 green, 3 blue; 8 red, 3 blue, 1 green; 15 red, 1 green
+Game 88: 7 green, 3 red, 10 blue; 8 blue, 8 red, 3 green; 18 green, 1 blue, 7 red; 8 red, 7 green, 10 blue
+Game 89: 5 red, 16 blue; 7 blue; 5 blue, 4 red; 3 blue, 4 green, 6 red; 1 red, 2 green, 16 blue
+Game 90: 19 blue, 5 green, 4 red; 2 green, 20 blue, 1 red; 18 blue
+Game 91: 10 red, 11 blue, 1 green; 18 red, 12 blue; 11 blue, 10 red
+Game 92: 3 green, 1 blue; 8 red, 5 green; 10 red, 3 green
+Game 93: 5 green, 1 blue, 5 red; 1 blue, 2 red, 7 green; 2 green, 6 red, 1 blue; 7 green, 1 blue, 2 red; 6 red, 1 green
+Game 94: 3 red, 6 blue, 2 green; 5 blue, 9 red; 11 blue, 5 red, 2 green; 2 green, 3 red, 14 blue; 5 red, 13 blue; 6 blue, 2 green, 8 red
+Game 95: 4 red, 3 green, 17 blue; 1 red, 5 green, 4 blue; 15 blue, 11 green; 5 green, 1 red, 4 blue; 11 blue, 2 green, 17 red
+Game 96: 3 red, 20 blue, 18 green; 1 red, 1 blue, 20 green; 18 blue, 4 green, 8 red
+Game 97: 11 green; 7 red, 8 green, 2 blue; 4 green, 17 red; 4 green, 7 red; 14 green, 18 red, 2 blue
+Game 98: 2 blue, 7 green, 1 red; 9 green, 10 red, 5 blue; 13 blue, 10 red, 8 green; 8 green, 11 red, 12 blue; 5 blue, 4 green, 2 red
+Game 99: 2 blue, 13 green; 1 blue; 1 red, 2 blue, 2 green; 1 red, 1 blue
+Game 100: 1 red, 14 green; 17 green, 12 red; 3 green, 7 red, 3 blue; 4 green, 13 red, 3 blue; 5 green, 11 red, 5 blue
diff --git a/day_02/Cargo.lock b/day_02/Cargo.lock
new file mode 100644
index 0000000..257854d
--- /dev/null
+++ b/day_02/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_02"
+version = "0.1.0"
diff --git a/day_02/Cargo.toml b/day_02/Cargo.toml
new file mode 100644
index 0000000..e0a8b89
--- /dev/null
+++ b/day_02/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day_02"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day_02/rustfmt.toml b/day_02/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/day_02/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/day_02/src/main.rs b/day_02/src/main.rs
new file mode 100644
index 0000000..f1dd395
--- /dev/null
+++ b/day_02/src/main.rs
@@ -0,0 +1,68 @@
+struct Game {
+	id: u32,
+	red: u32,
+	green: u32,
+	blue: u32,
+}
+
+fn main() {
+	let data = include_str!("../2.txt");
+	let sum: u32 = data
+		.lines()
+		.map(|line| {
+			let (title, contents) = line.split_once(": ").unwrap();
+			let id = title.split_once(' ').unwrap().1.parse().unwrap();
+			let mut game = Game {
+				id,
+				red: 0,
+				green: 0,
+				blue: 0,
+			};
+			for hand in contents.split("; ") {
+				for t in hand.split(", ") {
+					let (count, col) = t.split_once(" ").unwrap();
+					let count = count.parse().unwrap();
+					match col {
+						"red" => game.red = game.red.max(count),
+						"green" => game.green = game.green.max(count),
+						"blue" => game.blue = game.blue.max(count),
+						_ => panic!(),
+					}
+				}
+			}
+			game
+		})
+		.filter(|game| game.red <= 12 && game.green <= 13 && game.blue <= 14)
+		.map(|game| game.id)
+		.sum();
+
+	println!("{sum}");
+	let sum: u32 = data
+		.lines()
+		.map(|line| {
+			let (title, contents) = line.split_once(": ").unwrap();
+			let id = title.split_once(' ').unwrap().1.parse().unwrap();
+			let mut game = Game {
+				id,
+				red: 0,
+				green: 0,
+				blue: 0,
+			};
+			for hand in contents.split("; ") {
+				for t in hand.split(", ") {
+					let (count, col) = t.split_once(" ").unwrap();
+					let count = count.parse().unwrap();
+					match col {
+						"red" => game.red = game.red.max(count),
+						"green" => game.green = game.green.max(count),
+						"blue" => game.blue = game.blue.max(count),
+						_ => panic!(),
+					}
+				}
+			}
+			game
+		})
+		.map(|game| game.red * game.blue * game.green)
+		.sum();
+	println!("{sum}");
+}
diff --git a/day_03/3.txt b/day_03/3.txt
new file mode 100644
index 0000000..0182e0a
--- /dev/null
+++ b/day_03/3.txt
@@ -0,0 +1,140 @@
+311...672...34...391.....591......828.......................738....................223....803..472..................................714.840.
+.......*...........*.....*...........*........631%...703.......*..12....652.................*.$............368.769*148.................*....
+....411...........2....837.121........511.745...........*.48.422.@.........@.............311........887......*................457........595
+........*328...............&..........................144.*...................138............48.......*......682.........@...*.......777....
+.....144.....+........170...................207............813..../.&....139..*.....346........*..147..143.+.....78....536..79........*.....
+...........828...559.................181...%..........613.......10...928...*...993.+.........758.*.........471...#../...............573.....
+....................*164...132..........*........=.......*.................47.........186.........313..............411......................
+...............342............+..823.....533....519.....899...310................@........325...........15....................407.....#.....
+515......916......*.@...........*.............................*......961.........827......*.......=.........567....=238...874*.......420....
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+........306................................................182.....534......................229........744.........+.....=..........918.....
+303...........745...........361..............223..243.129.....=.................830.....%.................%......493....106............&....
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+.....612..........*.612..291..592........#.................567...................391.........................*....387............64.........
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+...-...............*.........*................................................................987.......200......*......445.......124...*...
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+..............$....*..............*...&........................*.......351%...*.............................226..........155....973+........
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+.....+.%................#...413........304...............384....*.................748........./....*...955.......#...........885.970........
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+.....35..........$...........834.../699...../.-......................461.......-........*...................*..................374....=.#412
+............763..201..$............................392........341........96......723.340.........327.736...1..$897.....471..................
+.....*512..*.........221.............125$....257.....@.....................*.277.*................*...*................................@....
+..301......694..............54.............../.........611...............596.../..100.......164.801....596..490....&361.........415....412..
+..................243...927*.........29*293........645*.......862*2...........................=............*.....................*..$.......
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+.863.............*......&..*..................98..283........532......750..............*........#.......+....594*...........................
+....*.........451.........623.....*....*...........&............%..50*.......44.....123......951.................62.943......365...995......
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+389.............&...........670.............$...42.....*...=..........564................................%...............+..................
+...*............435....*.............913..............574..149.......................962....................953...77..641....514............
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+...............768.......*......-.198.........160*............820......382...*......169.........*555..257...................................
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+.....205...572................696........&.....@.....@............709..611.............=.......270........*....165......783.......790.......
+......................965.........709..826....................882*......%..775.........391....*......985.5........*179.....*47.......&......
+.....451............@................#..................804..................$..161...........837..............*................$904....176.
+720.................70..........899.....868..............=.......357.252.......*..................707.......898.139.....704............*....
+....................................307*....510..................*.....*.......17..501.............*................@....*..........855.....
+.............745............451................*..689..980..@670.594.716..........*.................565......595..622.....793...............
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+........*........*....%......................................$645......-...*...150.....434.259..609*560....../............266..524..../.....
+.....203..........133.....596.619.................*...............676.107..811...*...........................115...........*.........178....
+............................=..*...............157.682.......262..*............196......$..........707................14..386...............
+.........871............605....721...........................*...867.................685..866.......*.............602...............628.....
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+.708..............311....+..296*497.....751...639....*..........269..........875....%.........................-.................36..........
+.........834..............................@...........708...........................87....298..*471.....$.....463...........................
+............+...739..........701........................................779................=.........265..642...............................
+......504..........*...............871*314....127..36..639.196..48..................96......../785.........*..854=.....607=...542...........
+...73............254.591.........................*..$.....*......*.........35......*...@................150...................-........340..
+........224............/....*214...=..........949..............455.........*.......377.88....................823......582.............*.....
+.......*.......643.......901........191..267.......293...................194..266.................987.......*........&....+.........545.....
+....604...583.....*............*742........*.........*........$..................*..365............*....=...880.55......540.520#............
+............*..272.....843..201.....*....&.128..+....433.......563......281*77.540.+.......979&..134....514.......*..............46.........
+...966.....67.......................19.934......224..........#....................................................693............*.....525..
+....*.........188.....904......*..............................210....*958.........811...............574....965................288..20.$.....
+..213.........*...137*.......325.....628..................406......34..............*.......406...$.*.........*.........867..........*.......
+...........810............................*.....926.........*..............372.....372.....*...266.716........985......*.............1......
+...............399*126.....*.......*...379..729.+........245.........893....-..866.....101.299..........8.544........784....................
+954......................63.501.529........-.......695/.................................*..........320....................211.55...533......
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diff --git a/day_03/Cargo.lock b/day_03/Cargo.lock
new file mode 100644
index 0000000..25acf3b
--- /dev/null
+++ b/day_03/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_03"
+version = "0.1.0"
diff --git a/day_03/Cargo.toml b/day_03/Cargo.toml
new file mode 100644
index 0000000..08ffcb3
--- /dev/null
+++ b/day_03/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day_03"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day_03/out.txt b/day_03/out.txt
new file mode 100644
index 0000000..5e3d0b7
--- /dev/null
+++ b/day_03/out.txt
@@ -0,0 +1,1191 @@
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diff --git a/day_03/rustfmt.toml b/day_03/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/day_03/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/day_03/src/main.rs b/day_03/src/main.rs
new file mode 100644
index 0000000..5064d31
--- /dev/null
+++ b/day_03/src/main.rs
@@ -0,0 +1,80 @@
+use std::collections::HashMap;
+
+fn main() {
+	let data: Vec<&str> = include_str!("../3.txt").lines().collect();
+	let width = data[0].len();
+	let mut engine_parts: Vec<u32> = Vec::new();
+	let mut gears: HashMap<(usize, usize), Vec<u32>> = HashMap::new();
+
+	for row in 0..data.len() {
+		let mut part_number = String::new();
+		let mut adjacent_gear_positions = Vec::new();
+		let mut is_adjacent = false;
+		for col in 0..width {
+			let char = data[row].chars().nth(col).unwrap();
+			if char.is_numeric() {
+				part_number.push(char);
+				for y in -1..=1isize {
+					let row = row as isize + y;
+					if row < 0 || row == data.len() as isize {
+						continue;
+					}
+					let row = row as usize;
+					for x in -1..=1isize {
+						let col = col as isize + x;
+						if col < 0 || col >= width as isize {
+							continue;
+						}
+						let col = col as usize;
+						let char = data[row].chars().nth(col).unwrap();
+						if !char.is_numeric() && char != '.' {
+							is_adjacent = true;
+						}
+						if char == '*' {
+							adjacent_gear_positions.push((row, col));
+						}
+					}
+				}
+			} else if !part_number.is_empty() {
+				let part_number_u32 = part_number.parse().unwrap();
+				if is_adjacent {
+					engine_parts.push(part_number_u32);
+				}
+				adjacent_gear_positions.sort();
+				adjacent_gear_positions.dedup();
+				for pos in &adjacent_gear_positions {
+					if let Some(gear) = gears.get_mut(pos) {
+						gear.push(part_number_u32);
+					} else {
+						gears.insert(pos.clone(), vec![part_number_u32]);
+					}
+				}
+
+				adjacent_gear_positions.clear();
+				is_adjacent = false;
+				part_number.clear();
+			}
+		}
+		if !part_number.is_empty() && is_adjacent {
+			let part_number_u32 = part_number.parse().unwrap();
+			engine_parts.push(part_number_u32);
+
+			adjacent_gear_positions.sort();
+			adjacent_gear_positions.dedup();
+			for pos in &adjacent_gear_positions {
+				if let Some(gear) = gears.get_mut(pos) {
+					gear.push(part_number_u32);
+				} else {
+					gears.insert(pos.clone(), vec![part_number_u32]);
+				}
+			}
+		}
+	}
+	println!("{}", engine_parts.iter().sum::<u32>());
+	let gear_sum: u32 = gears
+		.values()
+		.filter(|v| v.len() == 2)
+		.map(|v| v[0] * v[1])
+		.sum();
+	println!("{}", gear_sum);
+}
diff --git a/day_04/Cargo.lock b/day_04/Cargo.lock
new file mode 100644
index 0000000..319184f
--- /dev/null
+++ b/day_04/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_04"
+version = "0.1.0"
diff --git a/day_04/Cargo.toml b/day_04/Cargo.toml
new file mode 100644
index 0000000..765ed66
--- /dev/null
+++ b/day_04/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day_04"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day_04/input.txt b/day_04/input.txt
new file mode 100644
index 0000000..6b561ab
--- /dev/null
+++ b/day_04/input.txt
@@ -0,0 +1,198 @@
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diff --git a/day_04/rustfmt.toml b/day_04/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/day_04/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/day_04/src/main.rs b/day_04/src/main.rs
new file mode 100644
index 0000000..1afacf3
--- /dev/null
+++ b/day_04/src/main.rs
@@ -0,0 +1,86 @@
+use std::fs;
+
+fn main () {
+	for _ in 0..1000{
+	a();
+	b();}
+}
+
+fn a() {
+	let bytes = fs::read("input.txt").expect("input.txt not found");
+	let mut total_score = 0u16;
+	let mut p = 0;
+	while p < bytes.len() {
+		p += 10;
+		let mut winners = [0; 10];
+		for w in 0..10 {
+			if bytes[p] != b' ' {
+				winners[w] = (bytes[p] - 48) * 10;
+			}
+			winners[w] += bytes[p + 1] - 48;
+			p += 3;
+		}
+		p += 2;
+		let mut score: u16 = 0;
+		for _ in 0..25 {
+			let mut n = bytes[p + 1] - 48;
+			if bytes[p] != b' ' {
+				n += (bytes[p] - 48) * 10;
+			}
+			p += 3;
+			if winners.contains(&n) {
+				if score == 0 {
+					score = 1;
+				} else {
+					score = score << 1;
+				}
+			}
+		}
+		total_score += score;
+	}
+	println!("{total_score}");
+}
+
+fn b() {
+	let bytes = fs::read("input.txt").expect("input.txt not found");
+	let mut cards = vec![1];
+	let mut p = 0;
+	let mut card_id = 0;
+	while p < bytes.len() {
+		p += 10;
+		let mut winners = [0; 10];
+		for w in 0..10 {
+			if bytes[p] != b' ' {
+				winners[w] = (bytes[p] - 48) * 10;
+			}
+			winners[w] += bytes[p + 1] - 48;
+			p += 3;
+		}
+		p += 2;
+		let mut score = 0;
+		for _ in 0..25 {
+			let mut n = bytes[p + 1] - 48;
+			if bytes[p] != b' ' {
+				n += (bytes[p] - 48) * 10;
+			}
+			p += 3;
+			if winners.contains(&n) {
+				score += 1;
+			}
+		}
+		if card_id == cards.len() {
+			cards.push(1);
+		}
+		let this_card = cards[card_id];
+		for i in 1..(score+1) {
+			if card_id + i >= cards.len() {
+				cards.push(1 + this_card);
+			} else {
+				cards[card_id + i] += this_card;
+			}
+		}
+		card_id += 1;
+	}
+	let sum: usize = cards.iter().sum();
+	println!("{}", sum);
+}
diff --git a/day_05/Cargo.lock b/day_05/Cargo.lock
new file mode 100644
index 0000000..7237471
--- /dev/null
+++ b/day_05/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_05"
+version = "0.1.0"
diff --git a/day_05/Cargo.toml b/day_05/Cargo.toml
new file mode 100644
index 0000000..2735d24
--- /dev/null
+++ b/day_05/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day_05"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day_05/input.txt b/day_05/input.txt
new file mode 100644
index 0000000..dbfd24b
--- /dev/null
+++ b/day_05/input.txt
@@ -0,0 +1,226 @@
+seeds: 1310704671 312415190 1034820096 106131293 682397438 30365957 2858337556 1183890307 665754577 13162298 2687187253 74991378 1782124901 3190497 208902075 226221606 4116455504 87808390 2403629707 66592398
+
+seed-to-soil map:
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+
+soil-to-fertilizer map:
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+
+fertilizer-to-water map:
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+
+water-to-light map:
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+
+light-to-temperature map:
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+
+temperature-to-humidity map:
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+
+humidity-to-location map:
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diff --git a/day_05/rustfmt.toml b/day_05/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/day_05/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/day_05/src/main.rs b/day_05/src/main.rs
new file mode 100644
index 0000000..c41c151
--- /dev/null
+++ b/day_05/src/main.rs
@@ -0,0 +1,63 @@
+use std::fs;
+
+fn main() {
+	let data = fs::read_to_string("input.txt").expect("input.txt not found");
+	let (seed_text, maps) = data.split_once("\n\n").unwrap();
+	let seeds: Vec<usize> = seed_text[7..]
+		.split_whitespace()
+		.map(|s| s.parse().unwrap())
+		.collect();
+
+	let maps: Vec<Vec<(usize, usize, usize)>> = maps
+		.split("\n\n")
+		.map(|mapdata| {
+			let (_, mapdata) = mapdata.split_once('\n').unwrap();
+			mapdata
+				.lines()
+				.map(|line| {
+					let (dest_start, tmp) = line.split_once(' ').unwrap();
+					let (source_start, range_len) = tmp.split_once(' ').unwrap();
+					(
+						dest_start.parse().unwrap(),
+						source_start.parse().unwrap(),
+						range_len.parse().unwrap(),
+					)
+				})
+				.collect()
+		})
+		.collect();
+	let mut min_last_map = usize::MAX;
+	for &seed in &seeds {
+		let mut value = seed;
+		for map in &maps {
+			for &(dest_start, source_start, range_len) in map {
+				if value >= source_start && value < source_start + range_len {
+					value = dest_start + (value - source_start);
+					break;
+				}
+			}
+		}
+		min_last_map = min_last_map.min(value);
+	}
+	println!("{min_last_map}");
+
+	let seed_ranges: Vec<_> = (0..(seeds.len() / 2))
+		.map(|i| seeds[i]..seeds[i + 1])
+		.collect();
+	let mut min_last_map = usize::MAX;
+	for seed_range in &seed_ranges {
+		for seed in seed_range.clone() {
+			let mut value = seed;
+			for map in &maps {
+				for &(dest_start, source_start, range_len) in map {
+					if value >= source_start && value < source_start + range_len {
+						value = dest_start + (value - source_start);
+						break;
+					}
+				}
+			}
+			min_last_map = min_last_map.min(value);
+		}
+	}
+	println!("{min_last_map}");
+}
diff --git a/day_06/Cargo.lock b/day_06/Cargo.lock
new file mode 100644
index 0000000..ae33f71
--- /dev/null
+++ b/day_06/Cargo.lock
@@ -0,0 +1,35 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "day_06"
+version = "0.1.0"
+dependencies = [
+ "num-integer",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
+dependencies = [
+ "autocfg",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
+dependencies = [
+ "autocfg",
+]
diff --git a/day_06/Cargo.toml b/day_06/Cargo.toml
new file mode 100644
index 0000000..2f57cbd
--- /dev/null
+++ b/day_06/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "day_06"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+num-integer = "0.1.45"
diff --git a/day_06/input.txt b/day_06/input.txt
new file mode 100644
index 0000000..28f5ae9
--- /dev/null
+++ b/day_06/input.txt
@@ -0,0 +1,2 @@
+Time:      7  15   30
+Distance:  9  40  200
diff --git a/day_06/rustfmt.toml b/day_06/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/day_06/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/day_06/src/main.rs b/day_06/src/main.rs
new file mode 100644
index 0000000..e4ae126
--- /dev/null
+++ b/day_06/src/main.rs
@@ -0,0 +1,57 @@
+use std::fs;
+
+use num_integer::Roots;
+
+fn main() {
+	let data = fs::read_to_string("input.txt").unwrap();
+	let (time_str, record_str) = data.split_once('\n').unwrap();
+	let times: Vec<i64> = time_str
+		.split_whitespace()
+		.skip(1)
+		.map(|t| t.parse().unwrap())
+		.collect();
+	let records: Vec<i64> = record_str
+		.split_whitespace()
+		.skip(1)
+		.map(|t| t.parse().unwrap())
+		.collect();
+	let answer = times
+		.iter()
+		.zip(records.iter())
+		.map(|(&time, &record)| beat(time, record))
+		.fold(1, |a, b| a * b);
+	println!("{answer}");
+
+	let big_time: i64 = time_str[7..].replace(' ', "").parse().unwrap();
+	let big_record: i64 = record_str[9..].trim().replace(' ', "").parse().unwrap();
+
+	/*
+	distance = held * (time - held)
+
+	held * (time - held) = record
+	held*time - held*held = record
+	held*time - held*held - record = 0
+	held*held - held*time + record = 0
+	*/
+	// let lower = ((time * time / 4) - record).sqrt() - time / 2;
+	// let upper = -((time * time / 4) - record).sqrt() - time / 2;
+	// println!("{lower} -> {upper}");
+}
+
+fn beat(time: i64, record: i64) -> i64 {
+	let mut variants = 0;
+	for t in 0..time {
+		let dist = t * (time - t);
+		if dist > record {
+			variants += 1;
+		}
+	}
+
+	let time = time as f64;
+	let record = record as f64;
+	let lower = ((time * time / 4.0) - record).sqrt() - time / 2.0;
+	let upper = -((time * time / 4.0) - record).sqrt() - time / 2.0;
+	println!("{lower} -> {upper}");
+
+	variants
+}
diff --git a/day_07/Cargo.lock b/day_07/Cargo.lock
new file mode 100644
index 0000000..3b6fe5b
--- /dev/null
+++ b/day_07/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_07"
+version = "0.1.0"
diff --git a/day_07/Cargo.toml b/day_07/Cargo.toml
new file mode 100644
index 0000000..e8f44fe
--- /dev/null
+++ b/day_07/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day_07"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day_07/input.txt b/day_07/input.txt
new file mode 100644
index 0000000..7d03f8f
--- /dev/null
+++ b/day_07/input.txt
@@ -0,0 +1,1000 @@
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+22228 428
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+ATAKT 17
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+43324 802
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+QQ4Q7 756
+AAAA2 807
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+45JK3 159
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+87778 774
+433J4 877
+8T599 570
+QJ632 89
+4J222 477
+TTK8T 839
+96996 601
+3KJ3K 446
+943T7 545
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+66KK2 726
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+5JJ35 667
+44994 474
+T8J69 161
+TJ5Q2 289
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+Q7A69 647
+5T5TT 273
+J5KKQ 484
+24422 409
+TQK76 377
+KKK66 800
+QKKQA 384
+KKKA4 565
+J779J 691
+76566 307
+2J2Q6 941
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+J67KQ 376
+4454Q 672
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+QT7Q8 443
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+3ATTJ 245
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+48J5Q 831
+28K28 350
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+3A337 114
+A33J3 675
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diff --git a/day_07/rustfmt.toml b/day_07/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/day_07/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/day_07/src/main.rs b/day_07/src/main.rs
new file mode 100644
index 0000000..fb9834d
--- /dev/null
+++ b/day_07/src/main.rs
@@ -0,0 +1,130 @@
+use std::fs;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+enum HandType {
+	HighCard,
+	OnePair,
+	TwoPair,
+	ThreeOfAKind,
+	FullHouse,
+	FourOfAKind,
+	FiveOfAKind,
+}
+
+fn main() {
+	let data = fs::read_to_string("input.txt").unwrap();
+	let mut hands: Vec<_> = data
+		.lines()
+		.map(|line| line.split_once(' ').unwrap())
+		.map(|(hand, multiplier)| {
+			(
+				array(hand),
+				HandType::from(hand),
+				multiplier.parse::<usize>().unwrap(),
+				hand,
+			)
+		})
+		.collect();
+	hands.sort_by(|(hand_a, type_a, _, _), (hand_b, type_b, _, _)| {
+		type_a.cmp(type_b).then(hand_a.cmp(hand_b))
+	});
+	// dbg!(&hands);
+
+	let s: usize = hands
+		.iter()
+		.enumerate()
+		// .inspect(|a| {
+		// 	println!("{a:?}");
+		// })
+		.map(|(rank, (_, _, multiplier, _))| (rank + 1) * multiplier)
+		.sum();
+	println!("{s}");
+
+	let mut hands: Vec<_> = data
+		.lines()
+		.map(|line| line.split_once(' ').unwrap())
+		.map(|(hand, multiplier)| {
+			(
+				array_2(hand),
+				HandType::jokered(hand),
+				multiplier.parse::<usize>().unwrap(),
+				hand,
+			)
+		})
+		.collect();
+	hands.sort_by(|(hand_a, type_a, _, _), (hand_b, type_b, _, _)| {
+		type_a.cmp(type_b).then(hand_a.cmp(hand_b))
+	});
+
+	let s: usize = hands
+		.iter()
+		.enumerate()
+		.map(|(rank, (_, _, multiplier, _))| (rank + 1) * multiplier)
+		.sum();
+	println!("{s}");
+}
+
+fn array(hand: &str) -> Vec<usize> {
+	let values = "23456789TJQKA";
+	hand.chars().map(|c| values.find(c).unwrap()).collect()
+}
+
+fn array_2(hand: &str) -> Vec<usize> {
+	let values = "J23456789TQKA";
+	hand.chars().map(|c| values.find(c).unwrap()).collect()
+}
+
+impl HandType {
+	fn jokered(text: &str) -> Self {
+		fn f(text: &str) -> Vec<HandType> {
+			if text.contains('J') {
+				"23456789TQKA"
+					.chars()
+					.map(|c| {
+						//
+						let s = String::from(c);
+						f(&text.replace('J', &s))
+					})
+					.flatten()
+					.collect()
+			} else {
+				vec![HandType::from(text)]
+			}
+		}
+
+		let mut variants = f(text);
+		variants.sort();
+		*variants.last().unwrap()
+	}
+
+	fn from(text: &str) -> Self {
+		let mut types = Vec::new();
+		for c in text.chars() {
+			if !types.contains(&c) {
+				types.push(c);
+			}
+		}
+		let amounts: Vec<_> = types.iter().map(|&t| text.matches(t).count()).collect();
+
+		match types.len() {
+			1 => Self::FiveOfAKind,
+			2 => {
+				if amounts.contains(&2) {
+					Self::FullHouse
+				} else {
+					Self::FourOfAKind
+				}
+			}
+			3 => {
+				if amounts.contains(&3) {
+					Self::ThreeOfAKind
+				} else {
+					Self::TwoPair
+				}
+			}
+			4 => Self::OnePair,
+			5 => Self::HighCard,
+			_ => unreachable!(),
+		}
+	}
+}
diff --git a/day_08/Cargo.lock b/day_08/Cargo.lock
new file mode 100644
index 0000000..54e4ece
--- /dev/null
+++ b/day_08/Cargo.lock
@@ -0,0 +1,92 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "day_08"
+version = "0.1.0"
+dependencies = [
+ "num",
+]
+
+[[package]]
+name = "num"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b05180d69e3da0e530ba2a1dae5110317e49e3b7f3d41be227dc5f92e49ee7af"
+dependencies = [
+ "num-bigint",
+ "num-complex",
+ "num-integer",
+ "num-iter",
+ "num-rational",
+ "num-traits",
+]
+
+[[package]]
+name = "num-bigint"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "608e7659b5c3d7cba262d894801b9ec9d00de989e8a82bd4bef91d08da45cdc0"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ba157ca0885411de85d6ca030ba7e2a83a28636056c7c699b07c8b6f7383214"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
+dependencies = [
+ "autocfg",
+ "num-traits",
+]
+
+[[package]]
+name = "num-iter"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d03e6c028c5dc5cac6e2dec0efda81fc887605bb3d884578bb6d6bf7514e252"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0638a1c9d0a3c0914158145bc76cff373a75a627e6ecbfb71cbe6f453a5a19b0"
+dependencies = [
+ "autocfg",
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
+dependencies = [
+ "autocfg",
+]
diff --git a/day_08/Cargo.toml b/day_08/Cargo.toml
new file mode 100644
index 0000000..c367796
--- /dev/null
+++ b/day_08/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "day_08"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+num = "0.4.1"
diff --git a/day_08/input.txt b/day_08/input.txt
new file mode 100644
index 0000000..7840d8a
--- /dev/null
+++ b/day_08/input.txt
@@ -0,0 +1,760 @@
+LLRLRLRRRLRLRRRLRRRLRRLLRLLRRRLRLRRLLRLRLRRLRLRLLRLRRRLRLRRLRRLRRRLRRLRRLRRLLRRLLRRRLRRLRRLRRRLRLRRLRRLLLLRLRRLRLRRLLLRRLRRRLRRRLLRRRLRRRLRRLRRRLLLRRRLLLRRLRRLRRRLRRLRRRLRRLRRRLLRLRLRRRLRRLRLRLRRRLRLRLLLRRRLRRRLRRLRRLRLRRRLRRRLLRRRLRRLRLLLRRLLRRRLRRRLRRRLLRRRLLRRLRLRRRLRRLRRRR
+
+AAA = (DFD, PLS)
+BCG = (RNT, VJR)
+BCN = (HFN, KFC)
+BCR = (LKR, VQN)
+BDS = (CXG, HXR)
+BFF = (DXV, NMR)
+BFS = (CHN, SFK)
+BFX = (FPR, SNC)
+BGC = (TRV, SJN)
+BGN = (JJB, SMG)
+BHC = (LMP, RML)
+BHG = (BMN, HPH)
+BHL = (PMP, PNV)
+BJJ = (FLT, FRM)
+BJT = (SNV, MMS)
+BJV = (LQM, QMJ)
+BKM = (CDC, PSH)
+BKR = (HBR, KSQ)
+BLG = (GMR, VTL)
+BLN = (TSB, SHS)
+BMG = (NDL, RKP)
+BMN = (MPG, QMC)
+BNB = (DNG, NCQ)
+BPF = (PRG, QLS)
+BQL = (XFB, CXJ)
+BQR = (PPL, PHJ)
+BQV = (RGS, FGG)
+BRK = (DXJ, CNQ)
+BRQ = (TDC, SDB)
+BRS = (RDL, SRC)
+BRX = (CXK, XGH)
+BSG = (JQH, FBV)
+BSP = (NBX, RSM)
+BTD = (MLK, CRF)
+BTG = (LVS, FNX)
+BTH = (CRG, PNF)
+BVB = (QSF, LQC)
+BVN = (PXM, QVF)
+BXG = (NMR, DXV)
+CBJ = (LNH, LJD)
+CBS = (RPQ, GSM)
+CCB = (XSL, RSX)
+CCL = (BNB, FSJ)
+CDB = (BQV, NHX)
+CDC = (TSK, TBQ)
+CDL = (GRF, QFT)
+CDR = (MRL, TBF)
+CFH = (TBN, TJV)
+CFQ = (XBD, NNB)
+CGB = (NLF, TCF)
+CGR = (CDC, PSH)
+CGS = (CQJ, HQN)
+CHG = (NDL, RKP)
+CHM = (NXR, NXR)
+CHN = (BPF, QPF)
+CJB = (VRT, QNM)
+CJK = (PMM, JGL)
+CKT = (FVB, JQM)
+CKV = (GND, NSV)
+CLB = (MTK, LCF)
+CLC = (DVN, DVR)
+CMJ = (XLD, QVQ)
+CMR = (LQR, RLS)
+CMT = (JHM, KNX)
+CNQ = (FRL, BVB)
+CQJ = (PGL, KVX)
+CRF = (DRH, BRS)
+CRG = (GNG, FNV)
+CRR = (BQR, XTD)
+CRT = (MJG, MJG)
+CSD = (GBR, TMH)
+CSR = (RPP, HKT)
+CTR = (TMH, GBR)
+CTX = (RQX, SFN)
+CVC = (XBD, NNB)
+CVN = (TLM, PHH)
+CXG = (VPN, DHJ)
+CXJ = (KGL, BRQ)
+CXK = (GKD, DPT)
+CXS = (PLN, GXP)
+DBF = (LST, SRX)
+DBG = (MLN, NLT)
+DBV = (SRX, LST)
+DCH = (NFK, JNS)
+DDJ = (FKH, NHM)
+DDV = (SXC, FMN)
+DFD = (MVH, KGP)
+DGF = (BDS, SFH)
+DGR = (HJH, KNH)
+DHJ = (LMR, RXQ)
+DHQ = (SSQ, LCX)
+DHR = (RSK, JRV)
+DHX = (PTX, LVF)
+DJK = (CFQ, CVC)
+DLG = (BCG, VVJ)
+DNG = (KDS, HCS)
+DPF = (MDX, KRB)
+DPT = (HHH, FLR)
+DQK = (GPM, JFX)
+DQX = (CRT, VVH)
+DRH = (RDL, SRC)
+DRL = (GLS, RTV)
+DRV = (XRC, NXM)
+DSL = (CLB, PGG)
+DSN = (VMF, PBB)
+DSR = (TSB, SHS)
+DTA = (LBP, RFH)
+DVC = (SHX, DPF)
+DVD = (CDR, HCL)
+DVN = (GBJ, NQB)
+DVR = (GBJ, NQB)
+DXJ = (FRL, BVB)
+DXN = (SRM, GKL)
+DXP = (JMD, VSV)
+DXV = (MJS, PQF)
+FBH = (MNR, NCT)
+FBV = (RLT, BHL)
+FFK = (QXF, NRK)
+FGG = (JKJ, LDT)
+FGK = (SKH, DQX)
+FHF = (RTX, MBK)
+FHH = (CHM, CHM)
+FHQ = (RPP, HKT)
+FKG = (LFV, GBH)
+FKH = (SKD, FTG)
+FLM = (MHX, DHR)
+FLR = (SXK, XMK)
+FLT = (SCD, SCD)
+FLV = (SPJ, RBF)
+FMN = (QRX, CTX)
+FMP = (BSP, TBR)
+FMQ = (VVN, MLH)
+FNV = (CSR, FHQ)
+FNX = (SJL, VDH)
+FNZ = (GCG, SHR)
+FPQ = (XRV, DQK)
+FPR = (KNN, MCH)
+FQB = (DDJ, KDJ)
+FQX = (TRX, LSD)
+FQZ = (RFH, LBP)
+FRL = (QSF, LQC)
+FRM = (SCD, TBZ)
+FRR = (FQX, XHP)
+FRV = (KVC, LHQ)
+FSJ = (DNG, NCQ)
+FSL = (GDL, SXG)
+FTG = (MBN, HTR)
+FTV = (HTS, KSN)
+FVB = (KXQ, VTF)
+FVT = (GRF, QFT)
+FXC = (CCL, RTM)
+GBH = (HJM, QBF)
+GBJ = (VRK, TXJ)
+GBR = (RCJ, RFR)
+GCD = (GCH, LDX)
+GCG = (GQQ, KFS)
+GCH = (DGR, KXL)
+GCL = (RKV, TFH)
+GCR = (QST, RRL)
+GDL = (NDN, RSF)
+GFF = (BGN, PGP)
+GFT = (QTJ, GCD)
+GJF = (CXS, GLG)
+GJS = (QJH, RHM)
+GKD = (HHH, FLR)
+GKL = (LFG, RBV)
+GKX = (HSC, GTX)
+GLG = (GXP, PLN)
+GLS = (DVC, XRR)
+GMB = (KQR, QGS)
+GMG = (KGG, SRQ)
+GMH = (MLH, VVN)
+GMR = (KMS, KLC)
+GND = (LDN, TJC)
+GNG = (CSR, FHQ)
+GNN = (LMP, RML)
+GNQ = (DBF, DBV)
+GPD = (GTV, BFX)
+GPM = (VJC, KPQ)
+GQF = (BJV, VTR)
+GQJ = (PQD, RGT)
+GQQ = (GFF, THH)
+GRF = (HQJ, XQJ)
+GRH = (LVS, FNX)
+GRN = (LVL, MQV)
+GRS = (LSM, LSM)
+GSK = (LTT, CFH)
+GSM = (TXH, CJK)
+GSQ = (NLF, TCF)
+GTV = (FPR, SNC)
+GTX = (TKX, GFT)
+GXM = (PBM, FRR)
+GXP = (QHS, PCV)
+GXT = (XDK, PKP)
+HBR = (RXP, DBG)
+HBS = (DSR, BLN)
+HCB = (CRR, PXN)
+HCD = (LFV, GBH)
+HCL = (TBF, MRL)
+HCP = (RHM, QJH)
+HCS = (CMT, XQP)
+HDD = (FMQ, GMH)
+HDX = (NMD, BLG)
+HFN = (VHM, QMD)
+HGB = (GTX, HSC)
+HGG = (XKN, JHQ)
+HHH = (SXK, XMK)
+HHM = (BSG, SQH)
+HJH = (JVM, JPH)
+HJK = (QCS, XRH)
+HJM = (PKJ, HDD)
+HKD = (BLG, NMD)
+HKT = (LRL, XQM)
+HKX = (GCR, KBD)
+HLD = (FHH, NFJ)
+HMJ = (JHD, TVM)
+HMM = (RDS, DSN)
+HNL = (LSR, JSJ)
+HPC = (GRS, QNF)
+HPH = (MPG, QMC)
+HPN = (VTB, RJC)
+HQJ = (MMM, PQM)
+HQN = (PGL, KVX)
+HRD = (GDL, SXG)
+HSC = (GFT, TKX)
+HSR = (XPD, FFK)
+HTG = (MDR, DRL)
+HTL = (HDX, HKD)
+HTR = (GNN, BHC)
+HTS = (XMP, XMP)
+HVD = (KSQ, HBR)
+HVP = (JPG, PDL)
+HVX = (NRQ, RDT)
+HXM = (HTS, KSN)
+HXR = (VPN, DHJ)
+JCV = (SVP, HBS)
+JDR = (SPT, NDR)
+JFC = (XGT, FQZ)
+JFL = (TBR, BSP)
+JFX = (VJC, KPQ)
+JGJ = (RNC, RPK)
+JGL = (TMF, PVQ)
+JGS = (CCL, RTM)
+JHA = (FMP, JFL)
+JHD = (MJB, QJJ)
+JHM = (CDL, FVT)
+JHQ = (LPL, MPR)
+JJB = (DCH, TVS)
+JKJ = (LXP, XBB)
+JKK = (DVN, DVR)
+JMB = (PKD, HLD)
+JMD = (DRV, XMM)
+JMR = (TQP, SDD)
+JND = (SJH, XJH)
+JNS = (KTL, HSR)
+JPG = (KLN, QLT)
+JPH = (KVS, NGP)
+JQC = (NHP, HGG)
+JQH = (BHL, RLT)
+JQK = (RPK, RNC)
+JQM = (VTF, KXQ)
+JRV = (CVN, VHV)
+JSJ = (KLT, CMJ)
+JTH = (NCG, VGR)
+JVM = (NGP, KVS)
+JVT = (MMS, SNV)
+JXR = (FLV, KJC)
+KBD = (RRL, QST)
+KBF = (CGB, GSQ)
+KCM = (JMD, VSV)
+KCR = (BRX, MMG)
+KCX = (PGG, CLB)
+KDJ = (FKH, NHM)
+KDS = (CMT, XQP)
+KFC = (QMD, VHM)
+KFK = (QJT, SBC)
+KFS = (GFF, THH)
+KGG = (HXM, FTV)
+KGL = (SDB, TDC)
+KGP = (XRJ, VKM)
+KHH = (BFS, LVD)
+KHR = (CBJ, QHN)
+KHT = (PQD, RGT)
+KJB = (FXC, JGS)
+KJC = (SPJ, RBF)
+KJH = (RVM, FQB)
+KJT = (DVD, QVP)
+KKG = (MNJ, QLB)
+KLC = (RSN, GSK)
+KLN = (PFX, NLS)
+KLT = (XLD, QVQ)
+KMS = (RSN, GSK)
+KMT = (MBK, RTX)
+KNH = (JVM, JPH)
+KNN = (BCN, LSJ)
+KNX = (CDL, FVT)
+KPQ = (JTH, NXF)
+KQR = (HRD, FSL)
+KRB = (XDF, GPD)
+KRH = (CRF, MLK)
+KRJ = (NHX, BQV)
+KSN = (XMP, XGB)
+KSQ = (DBG, RXP)
+KSX = (GKL, SRM)
+KTL = (XPD, FFK)
+KVC = (NGT, XPR)
+KVN = (BHG, SHM)
+KVS = (PTJ, PLH)
+KVX = (VLR, MCG)
+KXD = (RSV, FBH)
+KXG = (LVN, KHR)
+KXK = (QGS, KQR)
+KXL = (KNH, HJH)
+KXQ = (MQK, KJH)
+LBD = (HCD, FKG)
+LBH = (DLG, LKT)
+LBP = (MKR, HVP)
+LCF = (NMK, KCR)
+LCX = (FRV, QDZ)
+LDN = (LMS, HHM)
+LDT = (LXP, XBB)
+LDX = (DGR, KXL)
+LFB = (JDR, PKB)
+LFG = (CTR, CSD)
+LFL = (KJB, QPB)
+LFV = (QBF, HJM)
+LHB = (TQP, SDD)
+LHC = (DXP, KCM)
+LHQ = (XPR, NGT)
+LHS = (PCG, MQC)
+LJD = (QJM, TRC)
+LKB = (PNF, CRG)
+LKR = (MBR, TLD)
+LKT = (VVJ, BCG)
+LLP = (XHV, PRT)
+LMP = (VND, RCH)
+LMR = (GXT, QSL)
+LMS = (BSG, SQH)
+LNH = (TRC, QJM)
+LNM = (FRR, PBM)
+LPL = (XNM, GNQ)
+LPQ = (LKR, VQN)
+LQB = (VJP, VXV)
+LQC = (RPC, CBS)
+LQM = (TSS, GMG)
+LQR = (RLN, NVC)
+LQZ = (FMN, SXC)
+LRL = (TGR, XQQ)
+LSD = (SFF, NFM)
+LSJ = (HFN, KFC)
+LSM = (DFD, PLS)
+LSR = (KLT, CMJ)
+LST = (RDH, MJT)
+LTT = (TJV, TBN)
+LVD = (CHN, SFK)
+LVF = (RVN, KXD)
+LVL = (DDV, DDV)
+LVN = (CBJ, QHN)
+LVS = (VDH, SJL)
+LXP = (VGM, TKG)
+MBK = (VML, VBC)
+MBN = (GNN, BHC)
+MBR = (VHQ, NLL)
+MBT = (QBQ, RNG)
+MCG = (MFR, MBT)
+MCH = (LSJ, BCN)
+MDR = (GLS, RTV)
+MDX = (GPD, XDF)
+MFR = (QBQ, RNG)
+MHN = (XSL, RSX)
+MHX = (RSK, JRV)
+MJB = (LLP, QSV)
+MJG = (LVL, LVL)
+MJR = (DQK, XRV)
+MJS = (VTD, HNL)
+MJT = (SVN, HPN)
+MKP = (QCS, XRH)
+MKR = (PDL, JPG)
+MLH = (MRQ, XKF)
+MLK = (BRS, DRH)
+MLN = (NDD, HVX)
+MMA = (KVC, LHQ)
+MMD = (TLN, KHH)
+MMG = (XGH, CXK)
+MMM = (SSX, SSX)
+MMS = (JQC, PXQ)
+MNJ = (FGK, PQV)
+MNQ = (KFK, XJX)
+MNR = (LKB, BTH)
+MPG = (HVD, BKR)
+MPR = (XNM, GNQ)
+MQC = (RFV, XFQ)
+MQK = (RVM, FQB)
+MQT = (HBS, SVP)
+MQV = (DDV, LQZ)
+MRL = (LQB, RXN)
+MRQ = (DHX, QHV)
+MTK = (NMK, KCR)
+MVH = (XRJ, VKM)
+MXJ = (DXJ, CNQ)
+MXM = (TCN, HKX)
+MXP = (SHM, BHG)
+NBX = (JGJ, JQK)
+NCA = (SXC, FMN)
+NCD = (GQJ, KHT)
+NCG = (BRK, MXJ)
+NCQ = (HCS, KDS)
+NCT = (BTH, LKB)
+NDD = (NRQ, RDT)
+NDL = (SDF, RLB)
+NDN = (TFR, QGN)
+NDR = (MKP, HJK)
+NFJ = (CHM, NTV)
+NFK = (HSR, KTL)
+NFM = (RGC, HMM)
+NGP = (PTJ, PLH)
+NGT = (KMT, FHF)
+NHM = (FTG, SKD)
+NHP = (XKN, JHQ)
+NHX = (FGG, RGS)
+NKH = (XMS, STV)
+NLF = (BKM, CGR)
+NLL = (JKK, CLC)
+NLS = (BTD, KRH)
+NLT = (HVX, NDD)
+NMD = (VTL, GMR)
+NMK = (MMG, BRX)
+NML = (DXP, KCM)
+NMR = (MJS, PQF)
+NNB = (GRH, BTG)
+NQB = (TXJ, VRK)
+NQH = (JDR, PKB)
+NQT = (GND, NSV)
+NRK = (DGF, XFL)
+NRQ = (PGT, LHS)
+NSF = (QCT, QCT)
+NSV = (TJC, LDN)
+NTV = (NXR, JFC)
+NVC = (CDB, KRJ)
+NVL = (LVN, KHR)
+NXF = (VGR, NCG)
+NXM = (KXK, GMB)
+NXR = (XGT, XGT)
+PBB = (NQT, CKV)
+PBM = (XHP, FQX)
+PCG = (RFV, XFQ)
+PCV = (QTC, HTL)
+PCX = (JND, VRX)
+PDL = (QLT, KLN)
+PFX = (KRH, BTD)
+PGG = (LCF, MTK)
+PGL = (VLR, MCG)
+PGP = (SMG, JJB)
+PGR = (LBH, SRF)
+PGT = (MQC, PCG)
+PHH = (NVL, KXG)
+PHJ = (VCG, VNT)
+PJM = (GJS, HCP)
+PKB = (SPT, NDR)
+PKD = (FHH, NFJ)
+PKJ = (GMH, FMQ)
+PKP = (SXS, MNQ)
+PLH = (JVT, BJT)
+PLN = (QHS, PCV)
+PLS = (MVH, KGP)
+PMM = (PVQ, TMF)
+PMP = (LFL, SLN)
+PNF = (GNG, FNV)
+PNQ = (CVC, CFQ)
+PNV = (LFL, SLN)
+PPL = (VCG, VNT)
+PQD = (MJR, FPQ)
+PQF = (VTD, HNL)
+PQM = (SSX, DHQ)
+PQV = (SKH, DQX)
+PRD = (FVB, JQM)
+PRG = (THM, KKG)
+PRT = (BVN, SHD)
+PSH = (TSK, TBQ)
+PTF = (VRX, JND)
+PTJ = (BJT, JVT)
+PTX = (RVN, KXD)
+PVQ = (TFG, JMB)
+PXM = (JMR, LHB)
+PXN = (XTD, BQR)
+PXQ = (NHP, HGG)
+QBF = (HDD, PKJ)
+QBQ = (RPH, XSF)
+QBR = (STV, XMS)
+QCC = (RMK, QGL)
+QCS = (LHC, NML)
+QCT = (SHR, GCG)
+QDH = (RMK, QGL)
+QDZ = (LHQ, KVC)
+QFH = (SJN, TRV)
+QFT = (HQJ, XQJ)
+QGL = (BQL, SKL)
+QGN = (SRG, HPC)
+QGS = (FSL, HRD)
+QHN = (LNH, LJD)
+QHP = (RBP, RMS)
+QHS = (HTL, QTC)
+QHV = (LVF, PTX)
+QJH = (PTF, PCX)
+QJJ = (QSV, LLP)
+QJM = (QSP, CJB)
+QJT = (CGS, VLK)
+QLB = (PQV, FGK)
+QLS = (KKG, THM)
+QLT = (NLS, PFX)
+QMC = (BKR, HVD)
+QMD = (TGL, TSJ)
+QMJ = (GMG, TSS)
+QNF = (LSM, ZZZ)
+QNM = (TDB, RFQ)
+QPB = (FXC, JGS)
+QPF = (QLS, PRG)
+QRX = (SFN, RQX)
+QSF = (CBS, RPC)
+QSL = (XDK, PKP)
+QSP = (QNM, VRT)
+QST = (MMD, RMN)
+QSV = (XHV, PRT)
+QTC = (HKD, HDX)
+QTJ = (LDX, GCH)
+QVF = (LHB, JMR)
+QVP = (CDR, HCL)
+QVQ = (KJT, TDM)
+QXF = (XFL, DGF)
+RBF = (LFB, NQH)
+RBP = (LBD, TDQ)
+RBV = (CSD, CTR)
+RCD = (GSQ, CGB)
+RCH = (RPD, SFX)
+RCJ = (RXK, RHL)
+RDH = (HPN, SVN)
+RDL = (PGR, TPK)
+RDR = (DHR, MHX)
+RDS = (PBB, VMF)
+RDT = (PGT, LHS)
+RFH = (MKR, HVP)
+RFQ = (KCX, DSL)
+RFR = (RHL, RXK)
+RFV = (RMQ, NCD)
+RGC = (RDS, DSN)
+RGS = (JKJ, LDT)
+RGT = (MJR, FPQ)
+RHL = (XJK, RJF)
+RHM = (PCX, PTF)
+RJC = (PNQ, DJK)
+RJF = (BXG, BFF)
+RKP = (RLB, SDF)
+RKV = (GQF, VKF)
+RLB = (NKH, QBR)
+RLN = (KRJ, CDB)
+RLQ = (RMS, RBP)
+RLS = (RLN, NVC)
+RLT = (PMP, PNV)
+RMK = (BQL, SKL)
+RML = (RCH, VND)
+RMN = (TLN, KHH)
+RMQ = (GQJ, KHT)
+RMS = (LBD, TDQ)
+RNC = (CMR, SQR)
+RNG = (XSF, RPH)
+RNT = (BGC, QFH)
+RPC = (RPQ, GSM)
+RPD = (HCB, VLG)
+RPH = (QHP, RLQ)
+RPK = (CMR, SQR)
+RPP = (LRL, XQM)
+RPQ = (CJK, TXH)
+RQB = (GLG, CXS)
+RQX = (KSX, DXN)
+RRL = (RMN, MMD)
+RSF = (TFR, QGN)
+RSK = (VHV, CVN)
+RSM = (JGJ, JQK)
+RSN = (CFH, LTT)
+RSV = (MNR, NCT)
+RSX = (BCR, LPQ)
+RTM = (FSJ, BNB)
+RTV = (DVC, XRR)
+RTX = (VBC, VML)
+RVM = (KDJ, DDJ)
+RVN = (FBH, RSV)
+RXK = (RJF, XJK)
+RXN = (VJP, VXV)
+RXP = (MLN, NLT)
+RXQ = (QSL, GXT)
+SBC = (CGS, VLK)
+SBD = (VBQ, VBQ)
+SCD = (FMP, JFL)
+SDB = (LNM, GXM)
+SDD = (SBD, SHT)
+SDF = (NKH, QBR)
+SFF = (RGC, HMM)
+SFH = (HXR, CXG)
+SFK = (QPF, BPF)
+SFN = (DXN, KSX)
+SFT = (FLV, KJC)
+SFX = (VLG, HCB)
+SHD = (QVF, PXM)
+SHM = (HPH, BMN)
+SHR = (GQQ, KFS)
+SHS = (CKT, PRD)
+SHT = (VBQ, BJJ)
+SHX = (KRB, MDX)
+SJH = (GCL, XKM)
+SJL = (QDH, QCC)
+SJN = (MXP, KVN)
+SKD = (HTR, MBN)
+SKH = (CRT, VVH)
+SKL = (CXJ, XFB)
+SLN = (QPB, KJB)
+SMG = (TVS, DCH)
+SNC = (KNN, MCH)
+SNV = (PXQ, JQC)
+SPJ = (LFB, NQH)
+SPT = (HJK, MKP)
+SQH = (JQH, FBV)
+SQR = (LQR, RLS)
+SRC = (TPK, PGR)
+SRF = (DLG, LKT)
+SRG = (GRS, GRS)
+SRM = (LFG, RBV)
+SRQ = (HXM, FTV)
+SRX = (MJT, RDH)
+SSQ = (FRV, FRV)
+SSX = (SSQ, SSQ)
+STV = (MXM, XCX)
+SVN = (RJC, VTB)
+SVP = (DSR, BLN)
+SXC = (QRX, CTX)
+SXG = (NDN, RSF)
+SXK = (SFT, JXR)
+SXS = (XJX, KFK)
+TBF = (RXN, LQB)
+TBN = (RDR, FLM)
+TBQ = (MHN, CCB)
+TBR = (RSM, NBX)
+TBZ = (JFL, FMP)
+TCF = (BKM, CGR)
+TCN = (GCR, KBD)
+TDB = (KCX, DSL)
+TDC = (GXM, LNM)
+TDM = (QVP, DVD)
+TDQ = (FKG, HCD)
+TFG = (PKD, HLD)
+TFH = (GQF, VKF)
+TFR = (SRG, SRG)
+TGL = (KBF, RCD)
+TGR = (PJM, TQV)
+THH = (BGN, PGP)
+THM = (MNJ, QLB)
+TJC = (LMS, HHM)
+TJJ = (QCT, FNZ)
+TJV = (RDR, FLM)
+TKG = (JCV, MQT)
+TKP = (JHD, TVM)
+TKX = (GCD, QTJ)
+TLD = (NLL, VHQ)
+TLM = (NVL, KXG)
+TLN = (LVD, BFS)
+TMF = (TFG, JMB)
+TMH = (RFR, RCJ)
+TPK = (LBH, SRF)
+TQP = (SBD, SHT)
+TQV = (HCP, GJS)
+TRC = (QSP, CJB)
+TRV = (KVN, MXP)
+TRX = (NFM, SFF)
+TSB = (CKT, PRD)
+TSJ = (RCD, KBF)
+TSK = (CCB, MHN)
+TSS = (SRQ, KGG)
+TVA = (SHR, GCG)
+TVM = (QJJ, MJB)
+TVS = (NFK, JNS)
+TXH = (JGL, PMM)
+TXJ = (TKP, HMJ)
+VBC = (GKX, HGB)
+VBQ = (FLT, FLT)
+VCG = (VVS, HTG)
+VDH = (QDH, QCC)
+VGM = (MQT, JCV)
+VGR = (MXJ, BRK)
+VHM = (TGL, TSJ)
+VHQ = (CLC, JKK)
+VHV = (TLM, PHH)
+VJC = (NXF, JTH)
+VJP = (BMG, CHG)
+VJR = (BGC, QFH)
+VKF = (VTR, BJV)
+VKM = (GJF, RQB)
+VLG = (PXN, CRR)
+VLK = (HQN, CQJ)
+VLR = (MBT, MFR)
+VMF = (CKV, NQT)
+VML = (GKX, HGB)
+VND = (RPD, SFX)
+VNT = (VVS, HTG)
+VPN = (LMR, RXQ)
+VQN = (TLD, MBR)
+VRK = (HMJ, TKP)
+VRT = (TDB, RFQ)
+VRX = (SJH, XJH)
+VSV = (XMM, DRV)
+VTB = (PNQ, DJK)
+VTD = (JSJ, LSR)
+VTF = (KJH, MQK)
+VTL = (KLC, KMS)
+VTR = (LQM, QMJ)
+VVH = (MJG, GRN)
+VVJ = (RNT, VJR)
+VVN = (XKF, MRQ)
+VVS = (DRL, MDR)
+VXV = (CHG, BMG)
+XBB = (TKG, VGM)
+XBD = (GRH, BTG)
+XCX = (TCN, HKX)
+XDF = (BFX, GTV)
+XDK = (MNQ, SXS)
+XFB = (BRQ, KGL)
+XFL = (SFH, BDS)
+XFQ = (RMQ, NCD)
+XGB = (NSF, TJJ)
+XGH = (DPT, GKD)
+XGT = (LBP, RFH)
+XHP = (TRX, LSD)
+XHV = (SHD, BVN)
+XJH = (XKM, GCL)
+XJK = (BFF, BXG)
+XJX = (SBC, QJT)
+XKF = (DHX, QHV)
+XKM = (RKV, TFH)
+XKN = (LPL, MPR)
+XLD = (KJT, TDM)
+XMK = (JXR, SFT)
+XMM = (XRC, NXM)
+XMP = (NSF, NSF)
+XMS = (MXM, XCX)
+XNM = (DBV, DBF)
+XPD = (NRK, QXF)
+XPR = (FHF, KMT)
+XQJ = (MMM, PQM)
+XQM = (TGR, XQQ)
+XQP = (JHM, KNX)
+XQQ = (PJM, TQV)
+XRC = (KXK, GMB)
+XRH = (NML, LHC)
+XRJ = (RQB, GJF)
+XRR = (SHX, DPF)
+XRV = (GPM, JFX)
+XSF = (QHP, RLQ)
+XSL = (LPQ, BCR)
+XTD = (PPL, PHJ)
+ZZZ = (PLS, DFD)
diff --git a/day_08/rustfmt.toml b/day_08/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/day_08/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/day_08/src/main.rs b/day_08/src/main.rs
new file mode 100644
index 0000000..adf7702
--- /dev/null
+++ b/day_08/src/main.rs
@@ -0,0 +1,46 @@
+use std::{collections::HashMap, fs};
+
+use num::Integer;
+
+fn main() {
+	let data = fs::read_to_string("input.txt").unwrap();
+	let (instructions, map) = data.split_once("\n\n").unwrap();
+	let map: HashMap<String, (String, String)> = map
+		.lines()
+		.map(|line| {
+			// BKM = (CDC, PSH)
+			let source = line[..3].to_owned();
+			let left = line[7..10].to_owned();
+			let right = line[12..15].to_owned();
+			(source, (left, right))
+		})
+		.collect();
+
+	let mut location = "AAA";
+	let mut steps = 0;
+	while location != "ZZZ" {
+		location = match &instructions[steps % instructions.len()..][..1] {
+			"L" => &map[location].0,
+			"R" => &map[location].1,
+			_ => panic!(),
+		};
+		steps += 1;
+	}
+	println!("{steps}");
+
+	let paths = map.keys().filter(|s| s.ends_with('A')).map(|start| {
+		let mut location = start;
+		let mut steps = 0;
+		while !location.ends_with('Z') {
+			location = match &instructions[steps % instructions.len()..][..1] {
+				"L" => &map[location].0,
+				"R" => &map[location].1,
+				_ => panic!(),
+			};
+			steps += 1;
+		}
+		steps
+	});
+	let total_steps: usize = paths.fold(1, |a, b| a.lcm(&b));
+	println!("{total_steps}");
+}