Solved day 2 and day 3

day_2a/.gitignore

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+target

day_2a/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_2a"
+version = "0.1.0"
+dependencies = [
+ "nom",
+]
+
+[[package]]
+name = "memchr"
+version = "2.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]

day_2a/Cargo.toml

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+[package]
+name = "day_2a"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nom = "7"

day_2a/example.txt

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+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green

day_2a/input.txt

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+Game 1: 1 blue, 8 green; 14 green, 15 blue; 3 green, 9 blue; 8 green, 8 blue, 1 red; 1 red, 9 green, 10 blue
+Game 2: 3 blue, 1 green, 2 red; 2 red, 2 green, 5 blue; 3 green, 10 blue; 8 red, 1 blue; 3 red, 1 green, 5 blue; 1 blue, 5 red, 3 green
+Game 3: 4 green, 1 blue; 6 blue, 5 green, 1 red; 11 green, 10 blue
+Game 4: 12 blue, 12 green, 3 red; 15 blue, 1 green, 10 red; 8 blue, 3 red, 2 green; 14 red, 8 blue
+Game 5: 7 blue, 8 red, 5 green; 15 blue, 16 red, 14 green; 3 blue, 14 red, 10 green
+Game 6: 4 blue, 13 red; 1 green, 13 blue, 11 red; 4 red, 19 blue; 18 blue, 10 red, 1 green
+Game 7: 8 green, 3 blue, 3 red; 2 red, 7 green, 10 blue; 6 green, 11 red, 3 blue
+Game 8: 10 red, 6 green, 1 blue; 15 green, 10 red, 3 blue; 8 red, 10 green, 5 blue
+Game 9: 2 green, 8 blue, 1 red; 6 blue, 10 red; 13 blue, 12 red, 7 green
+Game 10: 2 blue, 8 red, 10 green; 1 green, 2 blue; 1 red, 1 green; 7 red, 2 blue, 1 green
+Game 11: 8 green, 1 blue; 6 green; 2 green, 1 blue; 2 blue, 11 green; 1 red, 12 green
+Game 12: 3 red, 2 green, 15 blue; 1 blue, 1 green, 4 red; 1 green, 12 blue, 3 red; 1 red, 10 blue; 3 red, 2 green, 14 blue; 3 red, 13 blue
+Game 13: 7 blue, 5 red; 7 red, 3 green, 9 blue; 9 green, 7 blue, 7 red; 6 blue, 8 red; 11 red; 3 green, 7 blue, 8 red
+Game 14: 4 blue, 6 green, 7 red; 8 red, 4 green, 11 blue; 3 green, 9 red, 13 blue
+Game 15: 3 green, 1 blue, 5 red; 2 red; 1 red, 4 green
+Game 16: 1 green, 7 blue; 3 red, 5 blue; 1 green, 5 blue; 5 blue, 1 green; 1 green, 1 red, 13 blue
+Game 17: 4 blue, 2 red, 4 green; 1 blue, 7 red, 4 green; 4 red, 4 green, 10 blue; 1 blue, 4 red, 14 green
+Game 18: 7 blue, 5 green; 4 blue, 3 green; 1 red, 6 green, 7 blue
+Game 19: 10 blue, 3 red, 6 green; 3 blue, 4 red, 17 green; 19 green, 3 red, 3 blue; 19 green, 3 blue; 4 red, 7 green, 7 blue; 10 blue, 13 green, 1 red
+Game 20: 3 blue, 6 red, 1 green; 6 green, 7 red, 18 blue; 1 green, 5 red, 14 blue; 1 green, 12 blue, 8 red
+Game 21: 16 blue, 7 green, 13 red; 11 red, 7 blue, 5 green; 4 green, 3 blue
+Game 22: 14 blue, 6 red, 1 green; 9 red, 1 green, 11 blue; 3 red, 13 blue; 6 red, 10 blue; 13 red, 1 green, 2 blue
+Game 23: 17 red, 1 blue, 13 green; 19 green, 1 blue, 3 red; 7 red, 19 green; 16 red, 10 green; 16 red, 12 green, 1 blue
+Game 24: 1 green, 2 blue; 10 green, 4 blue; 8 blue, 11 green, 14 red
+Game 25: 9 blue, 10 red; 2 red, 7 green, 5 blue; 4 green, 10 red, 5 blue; 6 red, 6 blue; 12 blue, 4 green
+Game 26: 9 red, 2 blue, 5 green; 3 red, 4 green, 1 blue; 5 red, 2 blue, 13 green
+Game 27: 1 green, 14 blue, 2 red; 9 red, 7 blue, 7 green; 9 blue, 10 red, 7 green; 1 blue, 5 red, 3 green; 1 blue, 4 red; 9 red, 1 green
+Game 28: 11 red, 13 blue, 12 green; 8 blue, 4 green, 6 red; 2 blue, 9 green
+Game 29: 5 green, 16 red, 1 blue; 6 blue, 3 green, 2 red; 1 green, 7 blue, 9 red
+Game 30: 1 green, 2 blue, 2 red; 7 blue, 5 red; 2 red, 1 blue; 6 red, 1 green, 6 blue
+Game 31: 5 green, 7 blue, 14 red; 19 red, 9 green, 9 blue; 4 green, 8 red, 12 blue; 20 red, 12 green; 10 red, 3 green, 6 blue; 5 blue, 17 red, 8 green
+Game 32: 6 blue, 6 red, 8 green; 6 blue, 3 green, 7 red; 4 red, 6 green, 4 blue; 5 green, 3 blue, 5 red; 8 blue, 6 red, 5 green
+Game 33: 5 red, 15 green, 3 blue; 4 green, 8 red; 6 blue, 17 green, 2 red
+Game 34: 12 blue, 1 green; 3 red, 14 blue, 1 green; 1 green, 16 blue, 3 red
+Game 35: 2 red, 16 blue; 17 blue, 5 green; 10 blue, 3 green; 1 blue, 2 green; 4 blue, 4 green
+Game 36: 7 blue, 8 red, 4 green; 3 red, 13 green, 14 blue; 17 green, 2 blue, 8 red; 2 red, 13 blue, 2 green; 12 blue, 1 red, 9 green; 12 green, 10 blue
+Game 37: 5 green; 3 green, 14 red; 2 red, 1 blue; 11 green, 1 blue; 8 green, 18 red, 1 blue; 1 blue, 16 red
+Game 38: 5 red; 9 green, 11 blue, 7 red; 2 blue, 2 green, 1 red; 3 blue, 7 red; 5 red, 8 blue
+Game 39: 1 blue, 7 green, 6 red; 18 green, 2 red; 1 blue, 19 green, 6 red; 2 green, 3 blue, 9 red; 14 green, 4 red, 3 blue; 16 green, 4 red, 1 blue
+Game 40: 14 red, 2 green, 2 blue; 2 blue, 2 red, 4 green; 8 red, 2 blue; 1 green, 17 red; 10 red; 2 green, 3 red
+Game 41: 11 green, 1 red, 1 blue; 2 blue, 18 green, 3 red; 2 blue, 2 green, 8 red; 7 red, 1 blue, 17 green; 14 green, 2 blue; 2 blue, 14 red, 18 green
+Game 42: 2 red, 3 green, 15 blue; 3 green, 18 blue; 9 blue, 2 red
+Game 43: 4 green, 2 blue; 10 blue, 2 red, 14 green; 13 green, 1 red, 11 blue; 9 green, 10 blue; 14 green, 8 red, 8 blue
+Game 44: 10 red; 3 red, 8 blue, 1 green; 10 red, 2 blue, 1 green; 5 green, 7 blue, 17 red; 3 green, 18 red, 6 blue; 3 green, 11 blue, 3 red
+Game 45: 10 blue, 5 green; 14 blue, 5 green; 10 green, 14 blue, 1 red; 1 red, 5 green, 18 blue; 5 green, 5 blue, 1 red; 17 blue, 12 green, 1 red
+Game 46: 2 blue, 2 green; 1 green, 1 blue; 2 blue, 3 green; 1 red; 2 green
+Game 47: 6 blue, 1 red, 12 green; 2 red, 3 green, 4 blue; 1 blue, 13 green, 6 red; 12 green, 4 blue, 5 red
+Game 48: 4 green, 5 red; 19 green, 1 blue, 11 red; 4 red, 8 green; 10 red, 1 blue, 16 green
+Game 49: 12 red, 2 blue; 6 green; 1 green, 9 red
+Game 50: 1 green, 1 blue, 17 red; 1 blue, 14 red, 1 green; 2 blue, 6 red
+Game 51: 12 green, 9 blue, 1 red; 6 green, 2 blue, 1 red; 14 green, 5 blue; 1 green, 2 red, 12 blue; 4 green, 2 red, 8 blue; 1 green, 5 blue
+Game 52: 1 green, 7 blue, 3 red; 6 blue, 5 red, 5 green; 7 green; 5 blue, 1 green, 6 red
+Game 53: 3 blue, 1 red; 1 blue, 3 green; 2 green, 5 blue; 4 blue, 3 green; 1 green; 2 green, 5 blue, 1 red
+Game 54: 13 blue, 3 red; 17 blue, 1 green, 8 red; 2 green, 2 red, 11 blue; 2 green, 1 red, 4 blue; 8 red
+Game 55: 1 green; 3 blue, 5 red; 1 blue, 1 green, 4 red; 1 red, 10 blue; 4 red, 17 blue
+Game 56: 4 blue, 12 green, 12 red; 6 green, 10 blue, 2 red; 8 green, 11 red, 3 blue; 6 green, 10 red, 10 blue; 7 red, 5 green
+Game 57: 2 green, 8 blue, 3 red; 17 blue, 1 green, 9 red; 4 red, 7 blue
+Game 58: 4 blue, 1 red; 2 blue, 1 green; 2 red, 5 green, 4 blue; 7 green, 5 blue, 2 red
+Game 59: 4 green, 5 red; 4 green, 7 red, 1 blue; 15 red, 8 green
+Game 60: 6 green, 3 red; 4 red, 6 green, 4 blue; 5 green, 4 blue, 1 red; 3 red, 4 blue, 2 green; 7 red, 3 blue; 1 green, 1 blue
+Game 61: 7 red, 10 blue, 7 green; 11 blue, 9 green, 1 red; 11 red, 1 green, 3 blue; 3 green, 13 red, 2 blue; 7 green, 2 blue, 1 red
+Game 62: 10 green, 9 red; 6 blue, 10 red, 11 green; 7 red, 2 blue, 2 green
+Game 63: 10 green, 2 blue; 1 red; 9 green; 2 blue, 8 green; 1 blue, 1 green, 1 red
+Game 64: 2 green; 8 red; 4 green, 5 red, 2 blue
+Game 65: 2 red, 16 blue; 5 green, 11 blue, 3 red; 15 blue, 4 green, 3 red
+Game 66: 2 green, 3 blue; 1 red, 3 blue; 1 green, 4 blue; 1 blue, 2 green, 1 red; 2 blue; 1 red, 3 green, 5 blue
+Game 67: 2 blue, 11 red, 8 green; 13 blue, 19 red, 13 green; 3 red, 3 green, 3 blue; 2 red, 5 blue, 16 green; 13 red, 4 blue, 5 green
+Game 68: 1 blue, 9 red, 7 green; 3 green, 9 red, 4 blue; 7 green, 5 blue; 3 green, 9 red, 3 blue; 5 red, 1 blue, 8 green; 8 green, 1 blue, 4 red
+Game 69: 10 green, 1 red, 2 blue; 1 red, 11 green; 1 blue, 1 green; 8 green; 11 green, 1 red; 1 green, 3 blue
+Game 70: 8 red, 15 blue, 18 green; 14 blue, 9 red, 8 green; 6 blue, 2 red, 2 green; 1 green, 4 blue, 9 red; 3 blue, 15 green, 10 red
+Game 71: 10 red, 10 green, 6 blue; 3 green, 6 blue, 13 red; 7 green, 6 red, 12 blue
+Game 72: 12 red, 5 blue; 13 red, 6 green, 11 blue; 11 green, 7 red, 11 blue
+Game 73: 8 blue, 1 red, 3 green; 1 blue; 6 blue, 4 green
+Game 74: 1 red, 3 blue, 8 green; 6 green, 3 blue, 1 red; 18 green, 1 red; 3 blue, 1 red, 14 green; 5 green, 1 blue; 3 blue, 1 green
+Game 75: 4 blue, 1 red, 3 green; 6 blue; 11 green, 6 blue, 3 red; 10 green, 4 red; 2 blue, 2 red, 6 green
+Game 76: 7 blue; 15 blue, 2 red, 1 green; 2 blue, 5 red; 2 red, 15 blue; 4 red, 15 blue; 9 blue, 5 red
+Game 77: 12 blue, 8 green, 15 red; 12 blue, 19 red, 16 green; 6 blue, 5 green, 16 red
+Game 78: 2 red, 7 blue, 14 green; 1 red, 3 green, 1 blue; 4 blue, 8 green, 10 red
+Game 79: 3 red, 5 green; 2 blue, 1 red, 18 green; 4 red, 15 green, 2 blue; 18 green, 2 blue, 7 red; 7 green, 6 red
+Game 80: 8 green, 5 red, 9 blue; 14 blue, 13 red, 6 green; 14 blue, 7 red, 4 green; 3 blue, 16 red, 4 green; 5 green, 13 blue, 2 red; 16 blue, 2 green, 5 red
+Game 81: 10 green, 10 red, 4 blue; 13 red, 2 blue; 8 green, 10 red, 7 blue
+Game 82: 1 blue, 4 red, 7 green; 3 green, 2 blue, 3 red; 1 blue, 3 red, 3 green; 6 red, 4 green, 5 blue; 3 blue, 6 green
+Game 83: 3 red, 1 blue, 2 green; 6 blue, 2 green, 2 red; 6 green, 1 blue; 11 blue, 4 red, 10 green
+Game 84: 9 red, 12 green, 1 blue; 7 red, 5 green, 3 blue; 3 green, 8 blue, 11 red; 1 red, 3 blue, 10 green
+Game 85: 2 blue, 2 red; 3 blue, 3 red; 2 green, 2 red; 2 red, 4 green
+Game 86: 2 green, 5 blue, 9 red; 4 red, 2 green, 5 blue; 6 red, 2 green, 6 blue; 4 red, 4 blue, 1 green
+Game 87: 17 red, 3 blue, 2 green; 5 red, 1 green, 5 blue; 4 blue, 3 green, 7 red
+Game 88: 7 green, 1 blue, 1 red; 1 blue, 1 red, 10 green; 1 blue, 2 green; 5 green; 7 green, 1 blue; 1 red, 3 green
+Game 89: 6 red, 11 blue, 3 green; 3 blue, 4 green, 3 red; 4 blue, 17 red, 4 green; 17 blue, 3 green, 4 red; 3 red, 9 blue, 4 green; 6 red, 9 blue, 9 green
+Game 90: 9 red, 4 green, 1 blue; 6 green, 5 red, 11 blue; 3 blue, 8 red
+Game 91: 3 red, 7 blue, 1 green; 11 blue, 3 green, 4 red; 1 red, 8 blue, 3 green; 10 red, 4 blue, 3 green
+Game 92: 2 blue, 1 red; 7 red, 1 blue; 4 green, 11 red, 5 blue
+Game 93: 13 red, 11 green, 10 blue; 3 blue, 10 green; 3 blue, 7 red, 3 green
+Game 94: 9 green, 8 blue, 4 red; 7 blue, 9 green, 5 red; 16 green, 5 red; 4 blue
+Game 95: 9 green; 1 blue, 16 green; 2 green, 2 red; 1 green, 1 blue; 6 green; 7 green, 2 red
+Game 96: 6 green, 8 red, 5 blue; 2 blue, 14 green, 17 red; 2 blue, 15 green, 16 red; 16 green, 1 red; 16 red, 2 green, 1 blue; 18 red, 13 green, 6 blue
+Game 97: 9 green, 8 red, 11 blue; 11 green, 13 red, 4 blue; 7 blue, 1 green, 6 red; 1 blue, 12 red, 7 green
+Game 98: 1 green, 12 blue, 4 red; 8 blue, 5 red, 1 green; 1 green, 8 blue, 7 red; 1 green, 5 red, 6 blue; 3 blue, 1 green, 1 red; 4 blue, 1 green, 4 red
+Game 99: 1 blue, 2 green, 2 red; 2 red, 8 green; 14 green, 1 blue; 1 red, 2 green; 1 blue, 1 green, 2 red; 6 green, 2 red
+Game 100: 6 green, 15 red, 12 blue; 9 red; 16 red; 17 red, 3 blue, 7 green

day_2a/src/main.rs

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+use std::fs;
+use std::env;
+
+use nom::IResult;
+use nom::multi::separated_list0;
+use nom::branch::alt;
+use nom::bytes::complete::tag;
+use nom::character::complete::i32;
+use nom::character::complete::space1;
+use nom::character::complete::space0;
+use nom::combinator::value;
+use nom::sequence::tuple;
+use nom::sequence::preceded;
+use nom::sequence::separated_pair;
+use nom::sequence::terminated;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+enum Color {
+    Red,
+    Green,
+    Blue,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+struct Draw {
+    red_count: i32,
+    green_count: i32,
+    blue_count: i32,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+struct Game {
+    id: i32,
+    draws: Vec<Draw>,
+}
+
+fn parse_color(input: &str) -> IResult<&str, Color> {
+    alt((
+        value(Color::Red, tag("red")),
+        value(Color::Green, tag("green")),
+        value(Color::Blue, tag("blue")),
+    ))(input)
+}
+
+fn parse_game_id(input: &str) -> IResult<&str, i32> {
+    terminated(
+        preceded(
+            tuple((space0, tag("Game"),space1)),
+            i32,
+        ),
+        space0,
+    )(input)
+}
+
+fn parse_number_of_cubes(input: &str) -> IResult<&str, (i32, Color)> {
+    preceded(
+        space0,
+        separated_pair(
+            i32,
+            space1,
+            parse_color,
+        )
+    )(input)
+}
+
+fn parse_draw(input: &str) -> IResult<&str, Vec<(i32, Color)>> {
+    separated_list0(
+        tag(","),
+        parse_number_of_cubes
+    )(input)
+}
+
+fn parse_game_draws(input: &str) -> IResult<&str, Vec<Vec<(i32, Color)>>> {
+    separated_list0(
+        tag(";"),
+        parse_draw
+    )(input)
+}
+
+fn parse_input_line(input: &str) -> IResult<&str, (i32, Vec<Vec<(i32, Color)>>)> {
+    separated_pair(
+        parse_game_id,
+        tag(":"),
+        parse_game_draws,
+    )(input)
+}
+
+fn create_game_from_data(data: (i32, Vec<Vec<(i32, Color)>>)) -> Game {
+    let (id, draws_data) = data;
+    let mut draws: Vec<Draw> = Vec::new();
+    for draw_data in draws_data {
+        let mut draw = Draw{
+            red_count: 0,
+            green_count: 0,
+            blue_count: 0,
+        };
+
+        for color_count in draw_data {
+            let (count, color) = color_count;
+            match color {
+                Color::Red => draw.red_count += count,
+                Color::Green => draw.green_count += count,
+                Color::Blue => draw.blue_count += count,
+            }
+        }
+        draws.push(draw);
+    }
+    Game{
+        id,
+        draws,
+    }
+}
+
+fn parse_game(input: &str) -> Result<Game, String> {
+    match parse_input_line(input) {
+        Ok((rest, data)) => if rest == "" {
+            Ok(create_game_from_data(data))
+        } else {
+            Err(format!("Incomplete parse, remaining: {}", rest))
+        },
+        Err(error) => Err(error.to_string()),
+    }
+}
+
+fn main() {
+    let max_red = 12;
+    let max_green = 13;
+    let max_blue = 14;
+
+    let mut result = 0;
+
+    let args: Vec<String> = env::args().collect();
+    let file_path = &args[1];
+    let input_data = fs::read_to_string(file_path).unwrap_or_else(
+        |_|{panic!("Can't read file {}", file_path)});
+    for line in input_data.lines() {
+        let game = parse_game(line).unwrap_or_else(|e|panic!("Failed to parse line: {}", e));
+        let mut is_valid_game = true;
+        for draw in &game.draws {
+            if draw.red_count > max_red ||
+               draw.green_count > max_green ||
+               draw.blue_count > max_blue {
+                is_valid_game = false;
+                break;
+            }
+        }
+
+        if is_valid_game {
+            result += game.id;
+        }
+    }
+
+    println!("{}", result);
+}

day_2b/.gitignore

@@ -0,0 +1 @@
+target

day_2b/Cargo.lock

@@ -0,0 +1,32 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_2b"
+version = "0.1.0"
+dependencies = [
+ "nom",
+]
+
+[[package]]
+name = "memchr"
+version = "2.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]

day_2b/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "day_2b"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nom = "7"

day_2b/example.txt

@@ -0,0 +1,5 @@
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green

day_2b/input.txt

@@ -0,0 +1,100 @@
+Game 1: 1 blue, 8 green; 14 green, 15 blue; 3 green, 9 blue; 8 green, 8 blue, 1 red; 1 red, 9 green, 10 blue
+Game 2: 3 blue, 1 green, 2 red; 2 red, 2 green, 5 blue; 3 green, 10 blue; 8 red, 1 blue; 3 red, 1 green, 5 blue; 1 blue, 5 red, 3 green
+Game 3: 4 green, 1 blue; 6 blue, 5 green, 1 red; 11 green, 10 blue
+Game 4: 12 blue, 12 green, 3 red; 15 blue, 1 green, 10 red; 8 blue, 3 red, 2 green; 14 red, 8 blue
+Game 5: 7 blue, 8 red, 5 green; 15 blue, 16 red, 14 green; 3 blue, 14 red, 10 green
+Game 6: 4 blue, 13 red; 1 green, 13 blue, 11 red; 4 red, 19 blue; 18 blue, 10 red, 1 green
+Game 7: 8 green, 3 blue, 3 red; 2 red, 7 green, 10 blue; 6 green, 11 red, 3 blue
+Game 8: 10 red, 6 green, 1 blue; 15 green, 10 red, 3 blue; 8 red, 10 green, 5 blue
+Game 9: 2 green, 8 blue, 1 red; 6 blue, 10 red; 13 blue, 12 red, 7 green
+Game 10: 2 blue, 8 red, 10 green; 1 green, 2 blue; 1 red, 1 green; 7 red, 2 blue, 1 green
+Game 11: 8 green, 1 blue; 6 green; 2 green, 1 blue; 2 blue, 11 green; 1 red, 12 green
+Game 12: 3 red, 2 green, 15 blue; 1 blue, 1 green, 4 red; 1 green, 12 blue, 3 red; 1 red, 10 blue; 3 red, 2 green, 14 blue; 3 red, 13 blue
+Game 13: 7 blue, 5 red; 7 red, 3 green, 9 blue; 9 green, 7 blue, 7 red; 6 blue, 8 red; 11 red; 3 green, 7 blue, 8 red
+Game 14: 4 blue, 6 green, 7 red; 8 red, 4 green, 11 blue; 3 green, 9 red, 13 blue
+Game 15: 3 green, 1 blue, 5 red; 2 red; 1 red, 4 green
+Game 16: 1 green, 7 blue; 3 red, 5 blue; 1 green, 5 blue; 5 blue, 1 green; 1 green, 1 red, 13 blue
+Game 17: 4 blue, 2 red, 4 green; 1 blue, 7 red, 4 green; 4 red, 4 green, 10 blue; 1 blue, 4 red, 14 green
+Game 18: 7 blue, 5 green; 4 blue, 3 green; 1 red, 6 green, 7 blue
+Game 19: 10 blue, 3 red, 6 green; 3 blue, 4 red, 17 green; 19 green, 3 red, 3 blue; 19 green, 3 blue; 4 red, 7 green, 7 blue; 10 blue, 13 green, 1 red
+Game 20: 3 blue, 6 red, 1 green; 6 green, 7 red, 18 blue; 1 green, 5 red, 14 blue; 1 green, 12 blue, 8 red
+Game 21: 16 blue, 7 green, 13 red; 11 red, 7 blue, 5 green; 4 green, 3 blue
+Game 22: 14 blue, 6 red, 1 green; 9 red, 1 green, 11 blue; 3 red, 13 blue; 6 red, 10 blue; 13 red, 1 green, 2 blue
+Game 23: 17 red, 1 blue, 13 green; 19 green, 1 blue, 3 red; 7 red, 19 green; 16 red, 10 green; 16 red, 12 green, 1 blue
+Game 24: 1 green, 2 blue; 10 green, 4 blue; 8 blue, 11 green, 14 red
+Game 25: 9 blue, 10 red; 2 red, 7 green, 5 blue; 4 green, 10 red, 5 blue; 6 red, 6 blue; 12 blue, 4 green
+Game 26: 9 red, 2 blue, 5 green; 3 red, 4 green, 1 blue; 5 red, 2 blue, 13 green
+Game 27: 1 green, 14 blue, 2 red; 9 red, 7 blue, 7 green; 9 blue, 10 red, 7 green; 1 blue, 5 red, 3 green; 1 blue, 4 red; 9 red, 1 green
+Game 28: 11 red, 13 blue, 12 green; 8 blue, 4 green, 6 red; 2 blue, 9 green
+Game 29: 5 green, 16 red, 1 blue; 6 blue, 3 green, 2 red; 1 green, 7 blue, 9 red
+Game 30: 1 green, 2 blue, 2 red; 7 blue, 5 red; 2 red, 1 blue; 6 red, 1 green, 6 blue
+Game 31: 5 green, 7 blue, 14 red; 19 red, 9 green, 9 blue; 4 green, 8 red, 12 blue; 20 red, 12 green; 10 red, 3 green, 6 blue; 5 blue, 17 red, 8 green
+Game 32: 6 blue, 6 red, 8 green; 6 blue, 3 green, 7 red; 4 red, 6 green, 4 blue; 5 green, 3 blue, 5 red; 8 blue, 6 red, 5 green
+Game 33: 5 red, 15 green, 3 blue; 4 green, 8 red; 6 blue, 17 green, 2 red
+Game 34: 12 blue, 1 green; 3 red, 14 blue, 1 green; 1 green, 16 blue, 3 red
+Game 35: 2 red, 16 blue; 17 blue, 5 green; 10 blue, 3 green; 1 blue, 2 green; 4 blue, 4 green
+Game 36: 7 blue, 8 red, 4 green; 3 red, 13 green, 14 blue; 17 green, 2 blue, 8 red; 2 red, 13 blue, 2 green; 12 blue, 1 red, 9 green; 12 green, 10 blue
+Game 37: 5 green; 3 green, 14 red; 2 red, 1 blue; 11 green, 1 blue; 8 green, 18 red, 1 blue; 1 blue, 16 red
+Game 38: 5 red; 9 green, 11 blue, 7 red; 2 blue, 2 green, 1 red; 3 blue, 7 red; 5 red, 8 blue
+Game 39: 1 blue, 7 green, 6 red; 18 green, 2 red; 1 blue, 19 green, 6 red; 2 green, 3 blue, 9 red; 14 green, 4 red, 3 blue; 16 green, 4 red, 1 blue
+Game 40: 14 red, 2 green, 2 blue; 2 blue, 2 red, 4 green; 8 red, 2 blue; 1 green, 17 red; 10 red; 2 green, 3 red
+Game 41: 11 green, 1 red, 1 blue; 2 blue, 18 green, 3 red; 2 blue, 2 green, 8 red; 7 red, 1 blue, 17 green; 14 green, 2 blue; 2 blue, 14 red, 18 green
+Game 42: 2 red, 3 green, 15 blue; 3 green, 18 blue; 9 blue, 2 red
+Game 43: 4 green, 2 blue; 10 blue, 2 red, 14 green; 13 green, 1 red, 11 blue; 9 green, 10 blue; 14 green, 8 red, 8 blue
+Game 44: 10 red; 3 red, 8 blue, 1 green; 10 red, 2 blue, 1 green; 5 green, 7 blue, 17 red; 3 green, 18 red, 6 blue; 3 green, 11 blue, 3 red
+Game 45: 10 blue, 5 green; 14 blue, 5 green; 10 green, 14 blue, 1 red; 1 red, 5 green, 18 blue; 5 green, 5 blue, 1 red; 17 blue, 12 green, 1 red
+Game 46: 2 blue, 2 green; 1 green, 1 blue; 2 blue, 3 green; 1 red; 2 green
+Game 47: 6 blue, 1 red, 12 green; 2 red, 3 green, 4 blue; 1 blue, 13 green, 6 red; 12 green, 4 blue, 5 red
+Game 48: 4 green, 5 red; 19 green, 1 blue, 11 red; 4 red, 8 green; 10 red, 1 blue, 16 green
+Game 49: 12 red, 2 blue; 6 green; 1 green, 9 red
+Game 50: 1 green, 1 blue, 17 red; 1 blue, 14 red, 1 green; 2 blue, 6 red
+Game 51: 12 green, 9 blue, 1 red; 6 green, 2 blue, 1 red; 14 green, 5 blue; 1 green, 2 red, 12 blue; 4 green, 2 red, 8 blue; 1 green, 5 blue
+Game 52: 1 green, 7 blue, 3 red; 6 blue, 5 red, 5 green; 7 green; 5 blue, 1 green, 6 red
+Game 53: 3 blue, 1 red; 1 blue, 3 green; 2 green, 5 blue; 4 blue, 3 green; 1 green; 2 green, 5 blue, 1 red
+Game 54: 13 blue, 3 red; 17 blue, 1 green, 8 red; 2 green, 2 red, 11 blue; 2 green, 1 red, 4 blue; 8 red
+Game 55: 1 green; 3 blue, 5 red; 1 blue, 1 green, 4 red; 1 red, 10 blue; 4 red, 17 blue
+Game 56: 4 blue, 12 green, 12 red; 6 green, 10 blue, 2 red; 8 green, 11 red, 3 blue; 6 green, 10 red, 10 blue; 7 red, 5 green
+Game 57: 2 green, 8 blue, 3 red; 17 blue, 1 green, 9 red; 4 red, 7 blue
+Game 58: 4 blue, 1 red; 2 blue, 1 green; 2 red, 5 green, 4 blue; 7 green, 5 blue, 2 red
+Game 59: 4 green, 5 red; 4 green, 7 red, 1 blue; 15 red, 8 green
+Game 60: 6 green, 3 red; 4 red, 6 green, 4 blue; 5 green, 4 blue, 1 red; 3 red, 4 blue, 2 green; 7 red, 3 blue; 1 green, 1 blue
+Game 61: 7 red, 10 blue, 7 green; 11 blue, 9 green, 1 red; 11 red, 1 green, 3 blue; 3 green, 13 red, 2 blue; 7 green, 2 blue, 1 red
+Game 62: 10 green, 9 red; 6 blue, 10 red, 11 green; 7 red, 2 blue, 2 green
+Game 63: 10 green, 2 blue; 1 red; 9 green; 2 blue, 8 green; 1 blue, 1 green, 1 red
+Game 64: 2 green; 8 red; 4 green, 5 red, 2 blue
+Game 65: 2 red, 16 blue; 5 green, 11 blue, 3 red; 15 blue, 4 green, 3 red
+Game 66: 2 green, 3 blue; 1 red, 3 blue; 1 green, 4 blue; 1 blue, 2 green, 1 red; 2 blue; 1 red, 3 green, 5 blue
+Game 67: 2 blue, 11 red, 8 green; 13 blue, 19 red, 13 green; 3 red, 3 green, 3 blue; 2 red, 5 blue, 16 green; 13 red, 4 blue, 5 green
+Game 68: 1 blue, 9 red, 7 green; 3 green, 9 red, 4 blue; 7 green, 5 blue; 3 green, 9 red, 3 blue; 5 red, 1 blue, 8 green; 8 green, 1 blue, 4 red
+Game 69: 10 green, 1 red, 2 blue; 1 red, 11 green; 1 blue, 1 green; 8 green; 11 green, 1 red; 1 green, 3 blue
+Game 70: 8 red, 15 blue, 18 green; 14 blue, 9 red, 8 green; 6 blue, 2 red, 2 green; 1 green, 4 blue, 9 red; 3 blue, 15 green, 10 red
+Game 71: 10 red, 10 green, 6 blue; 3 green, 6 blue, 13 red; 7 green, 6 red, 12 blue
+Game 72: 12 red, 5 blue; 13 red, 6 green, 11 blue; 11 green, 7 red, 11 blue
+Game 73: 8 blue, 1 red, 3 green; 1 blue; 6 blue, 4 green
+Game 74: 1 red, 3 blue, 8 green; 6 green, 3 blue, 1 red; 18 green, 1 red; 3 blue, 1 red, 14 green; 5 green, 1 blue; 3 blue, 1 green
+Game 75: 4 blue, 1 red, 3 green; 6 blue; 11 green, 6 blue, 3 red; 10 green, 4 red; 2 blue, 2 red, 6 green
+Game 76: 7 blue; 15 blue, 2 red, 1 green; 2 blue, 5 red; 2 red, 15 blue; 4 red, 15 blue; 9 blue, 5 red
+Game 77: 12 blue, 8 green, 15 red; 12 blue, 19 red, 16 green; 6 blue, 5 green, 16 red
+Game 78: 2 red, 7 blue, 14 green; 1 red, 3 green, 1 blue; 4 blue, 8 green, 10 red
+Game 79: 3 red, 5 green; 2 blue, 1 red, 18 green; 4 red, 15 green, 2 blue; 18 green, 2 blue, 7 red; 7 green, 6 red
+Game 80: 8 green, 5 red, 9 blue; 14 blue, 13 red, 6 green; 14 blue, 7 red, 4 green; 3 blue, 16 red, 4 green; 5 green, 13 blue, 2 red; 16 blue, 2 green, 5 red
+Game 81: 10 green, 10 red, 4 blue; 13 red, 2 blue; 8 green, 10 red, 7 blue
+Game 82: 1 blue, 4 red, 7 green; 3 green, 2 blue, 3 red; 1 blue, 3 red, 3 green; 6 red, 4 green, 5 blue; 3 blue, 6 green
+Game 83: 3 red, 1 blue, 2 green; 6 blue, 2 green, 2 red; 6 green, 1 blue; 11 blue, 4 red, 10 green
+Game 84: 9 red, 12 green, 1 blue; 7 red, 5 green, 3 blue; 3 green, 8 blue, 11 red; 1 red, 3 blue, 10 green
+Game 85: 2 blue, 2 red; 3 blue, 3 red; 2 green, 2 red; 2 red, 4 green
+Game 86: 2 green, 5 blue, 9 red; 4 red, 2 green, 5 blue; 6 red, 2 green, 6 blue; 4 red, 4 blue, 1 green
+Game 87: 17 red, 3 blue, 2 green; 5 red, 1 green, 5 blue; 4 blue, 3 green, 7 red
+Game 88: 7 green, 1 blue, 1 red; 1 blue, 1 red, 10 green; 1 blue, 2 green; 5 green; 7 green, 1 blue; 1 red, 3 green
+Game 89: 6 red, 11 blue, 3 green; 3 blue, 4 green, 3 red; 4 blue, 17 red, 4 green; 17 blue, 3 green, 4 red; 3 red, 9 blue, 4 green; 6 red, 9 blue, 9 green
+Game 90: 9 red, 4 green, 1 blue; 6 green, 5 red, 11 blue; 3 blue, 8 red
+Game 91: 3 red, 7 blue, 1 green; 11 blue, 3 green, 4 red; 1 red, 8 blue, 3 green; 10 red, 4 blue, 3 green
+Game 92: 2 blue, 1 red; 7 red, 1 blue; 4 green, 11 red, 5 blue
+Game 93: 13 red, 11 green, 10 blue; 3 blue, 10 green; 3 blue, 7 red, 3 green
+Game 94: 9 green, 8 blue, 4 red; 7 blue, 9 green, 5 red; 16 green, 5 red; 4 blue
+Game 95: 9 green; 1 blue, 16 green; 2 green, 2 red; 1 green, 1 blue; 6 green; 7 green, 2 red
+Game 96: 6 green, 8 red, 5 blue; 2 blue, 14 green, 17 red; 2 blue, 15 green, 16 red; 16 green, 1 red; 16 red, 2 green, 1 blue; 18 red, 13 green, 6 blue
+Game 97: 9 green, 8 red, 11 blue; 11 green, 13 red, 4 blue; 7 blue, 1 green, 6 red; 1 blue, 12 red, 7 green
+Game 98: 1 green, 12 blue, 4 red; 8 blue, 5 red, 1 green; 1 green, 8 blue, 7 red; 1 green, 5 red, 6 blue; 3 blue, 1 green, 1 red; 4 blue, 1 green, 4 red
+Game 99: 1 blue, 2 green, 2 red; 2 red, 8 green; 14 green, 1 blue; 1 red, 2 green; 1 blue, 1 green, 2 red; 6 green, 2 red
+Game 100: 6 green, 15 red, 12 blue; 9 red; 16 red; 17 red, 3 blue, 7 green

day_2b/src/main.rs

@@ -0,0 +1,152 @@
+use std::fs;
+use std::env;
+
+use nom::IResult;
+use nom::multi::separated_list0;
+use nom::branch::alt;
+use nom::bytes::complete::tag;
+use nom::character::complete::i32;
+use nom::character::complete::space1;
+use nom::character::complete::space0;
+use nom::combinator::value;
+use nom::sequence::tuple;
+use nom::sequence::preceded;
+use nom::sequence::separated_pair;
+use nom::sequence::terminated;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+enum Color {
+    Red,
+    Green,
+    Blue,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+struct Draw {
+    red_count: i32,
+    green_count: i32,
+    blue_count: i32,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+struct Game {
+    id: i32,
+    draws: Vec<Draw>,
+}
+
+fn parse_color(input: &str) -> IResult<&str, Color> {
+    alt((
+        value(Color::Red, tag("red")),
+        value(Color::Green, tag("green")),
+        value(Color::Blue, tag("blue")),
+    ))(input)
+}
+
+fn parse_game_id(input: &str) -> IResult<&str, i32> {
+    terminated(
+        preceded(
+            tuple((space0, tag("Game"),space1)),
+            i32,
+        ),
+        space0,
+    )(input)
+}
+
+fn parse_number_of_cubes(input: &str) -> IResult<&str, (i32, Color)> {
+    preceded(
+        space0,
+        separated_pair(
+            i32,
+            space1,
+            parse_color,
+        )
+    )(input)
+}
+
+fn parse_draw(input: &str) -> IResult<&str, Vec<(i32, Color)>> {
+    separated_list0(
+        tag(","),
+        parse_number_of_cubes
+    )(input)
+}
+
+fn parse_game_draws(input: &str) -> IResult<&str, Vec<Vec<(i32, Color)>>> {
+    separated_list0(
+        tag(";"),
+        parse_draw
+    )(input)
+}
+
+fn parse_input_line(input: &str) -> IResult<&str, (i32, Vec<Vec<(i32, Color)>>)> {
+    separated_pair(
+        parse_game_id,
+        tag(":"),
+        parse_game_draws,
+    )(input)
+}
+
+fn create_game_from_data(data: (i32, Vec<Vec<(i32, Color)>>)) -> Game {
+    let (id, draws_data) = data;
+    let mut draws: Vec<Draw> = Vec::new();
+    for draw_data in draws_data {
+        let mut draw = Draw{
+            red_count: 0,
+            green_count: 0,
+            blue_count: 0,
+        };
+
+        for color_count in draw_data {
+            let (count, color) = color_count;
+            match color {
+                Color::Red => draw.red_count += count,
+                Color::Green => draw.green_count += count,
+                Color::Blue => draw.blue_count += count,
+            }
+        }
+        draws.push(draw);
+    }
+    Game{
+        id,
+        draws,
+    }
+}
+
+fn parse_game(input: &str) -> Result<Game, String> {
+    match parse_input_line(input) {
+        Ok((rest, data)) => if rest == "" {
+            Ok(create_game_from_data(data))
+        } else {
+            Err(format!("Incomplete parse, remaining: {}", rest))
+        },
+        Err(error) => Err(error.to_string()),
+    }
+}
+
+fn main() {
+    let mut result = 0;
+
+    let args: Vec<String> = env::args().collect();
+    let file_path = &args[1];
+    let input_data = fs::read_to_string(file_path).unwrap_or_else(
+        |_|{panic!("Can't read file {}", file_path)});
+    for line in input_data.lines() {
+        let game = parse_game(line).unwrap_or_else(|e|panic!("Failed to parse line: {}", e));
+        let mut max_red = 0;
+        let mut max_green = 0;
+        let mut max_blue = 0;
+        for draw in &game.draws {
+            if draw.red_count > max_red {
+                max_red = draw.red_count;
+            }
+            if draw.green_count > max_green {
+                max_green = draw.green_count;
+            }
+            if draw.blue_count > max_blue {
+                max_blue = draw.blue_count;
+            }
+        }
+        result += max_red * max_green * max_blue;
+    }
+
+    println!("{}", result);
+}

day_3a/.gitignore

@@ -0,0 +1 @@
+target

day_3a/Cargo.lock

@@ -0,0 +1,32 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day_3a"
+version = "0.1.0"
+dependencies = [
+ "nom",
+]
+
+[[package]]
+name = "memchr"
+version = "2.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]

day_3a/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "day_3a"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nom = "7"

day_3a/example.txt

@@ -0,0 +1,10 @@
+467..114..
+...*......
+..35..633.
+......#...
+617*......
+.....+.58.
+..592.....
+......755.
+...$.*....
+.664.598..

day_3a/input.txt

@@ -0,0 +1,140 @@
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+........../..=662.824.........+............863..47........-.700.....437..........316..........................96.*......348*632....138.$932.
+........-..........*.......................................................465....*.........243......&........*...94..+..........*..........
+..41...532.......511.....-......$........&....216.................................330...715..../...309........415.....388.....873.287.265...
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+797/.388*........*..................*........627.........................../.............897..........................@.................*...
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day_3a/src/main.rs

@@ -0,0 +1,108 @@
+use std::fs;
+use std::env;
+
+struct Number {
+    value: u32,
+    row: usize,
+    col: usize,
+    len: usize,
+}
+
+fn get_numbers(engine: &Vec<Vec<char>>) -> Vec<Number> {
+    let mut numbers: Vec<Number> = Vec::new();
+    for row in 0..engine.len() {
+        let mut col = 0;
+        loop {
+            if col >= engine[row].len() {
+                break;
+            }
+
+            let mut number = Number{
+                value: 0,
+                row,
+                col,
+                len: 0,
+            };
+
+            while col < engine[row].len() && engine[row][col].is_digit(10) {
+                number.value = number.value * 10 + engine[row][col].to_digit(10).unwrap();
+                number.len += 1;
+                col += 1;
+            }
+
+            if number.len != 0 {
+                numbers.push(number);
+            }
+            col += 1;
+        }
+    }
+    numbers
+}
+
+fn build_engine(input_data: String) -> Vec<Vec<char>> {
+    let mut engine: Vec<Vec<char>> = Vec::new();
+    for line in input_data.lines() {
+        let mut engine_line: Vec<char> = Vec::new();
+        for char in line.chars() {
+            engine_line.push(char);
+        }
+        engine.push(engine_line);
+    }
+    engine
+}
+
+fn is_next_to_symbol(number: &Number, engine: &Vec<Vec<char>>) -> bool {
+    let start_row : usize = if number.row > 0 {
+        number.row - 1
+    } else {
+        number.row 
+    };
+
+    let end_row : usize = if number.row < engine.len() - 1 {
+        number.row + 1
+    } else {
+        number.row 
+    };
+
+    let start_col : usize = if number.col > 0 {
+        number.col - 1
+    } else {
+        number.col
+    };
+
+    let end_col:usize = if number.col + number.len < engine.len() {
+        number.col + number.len
+    } else {
+        number.col + number.len - 1
+    };
+
+    for row in start_row..end_row+1 {
+        for col in start_col..end_col+1 {
+            if !engine[row][col].is_digit(10) && engine[row][col] != '.' {
+                return true;
+            }
+        }
+    }
+
+    false
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let file_path = &args[1];
+    let input_data = fs::read_to_string(file_path).unwrap_or_else(
+        |_|{panic!("Can't read file {}", file_path)});
+
+
+    let engine = build_engine(input_data);
+    let numbers = get_numbers(&engine);
+    let result = numbers.into_iter().fold(0, |acc, n| {
+        if is_next_to_symbol(&n, &engine) {
+            acc + n.value
+        } else {
+            acc
+        }
+    });
+
+    println!("{}", result);
+}

day_3b/.gitignore

@@ -0,0 +1 @@
+target

day_3b/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_3b"
+version = "0.1.0"

day_3b/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "day_3b"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

day_3b/example.txt

@@ -0,0 +1,10 @@
+467..114..
+...*......
+..35..633.
+......#...
+617*......
+.....+.58.
+..592.....
+......755.
+...$.*....
+.664.598..

day_3b/input.txt

@@ -0,0 +1,140 @@
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+......#...55......................807.......424..968.................738...*......$..................598-.....77...408......%.......458.....
+....................88...272*................-....../....................544.......................$.........*.........11+...313....+.......
+108............819...*.......594..883..../............215..22.....................566*799........217....197..176...721......................
+.....332.......*.....846..-.......#...157................@......454....698...622..........430........47*............................../.....
+.............194..........239..................713*331..............51*.............800.....-..600.............&479..........-........805...
+......637*.....................847...........................274.#..........594...........................533........883....722....*........
+..........61...310.12......*..........923...............174....*.299.......-................132............&.........*..........876.331.....
+...............*.....*...435.864......+.......................11.....890....................$..........%............862.....968.............
+...../......404......398..........540.....................*............$.........287....................311.....515............*............
+.....564.....................807...*...567.............985.100.....%.....................227..................$.*.........*........974.156..
+..............156.953...........$........$.....................695.329..................=.............836..176..128....864..216#....*.......
+.767-...#.......%....*741...........-169........452/............*.............+...........174.....813....*..........%..............230......
+........17...............................159..........377=....659..........725....$......*........$...971.........907.766...................
+...............408.914........788...%......@...................................660.....138....333..........48..............=380...104.......
+.............$........-......*.......480...............194..*527........*....................*...............*578..961...........*..........
+...444..428..470..........128...............684.399.....*............105.680......7*583............................*.......*....53....*.....
+.....*.*...........223..........&19..........*.....*...246.....*........................526*939..........*....33..51....403..........706....
+...832..383...287.........................216....103...........710..................958...................288...............................

day_3b/src/main.rs

@@ -0,0 +1,109 @@
+use std::fs;
+use std::env;
+
+struct Number {
+    value: u32,
+    row: usize,
+    col: usize,
+    len: usize,
+}
+
+fn get_numbers(engine: &Vec<Vec<char>>) -> Vec<Number> {
+    let mut numbers: Vec<Number> = Vec::new();
+    for row in 0..engine.len() {
+        let mut col = 0;
+        loop {
+            if col >= engine[row].len() {
+                break;
+            }
+
+            let mut number = Number{
+                value: 0,
+                row,
+                col,
+                len: 0,
+            };
+
+            while col < engine[row].len() && engine[row][col].is_digit(10) {
+                number.value = number.value * 10 + engine[row][col].to_digit(10).unwrap();
+                number.len += 1;
+                col += 1;
+            }
+
+            if number.len != 0 {
+                numbers.push(number);
+            }
+            col += 1;
+        }
+    }
+    numbers
+}
+
+fn build_engine(input_data: String) -> Vec<Vec<char>> {
+    let mut engine: Vec<Vec<char>> = Vec::new();
+    for line in input_data.lines() {
+        let mut engine_line: Vec<char> = Vec::new();
+        for char in line.chars() {
+            engine_line.push(char);
+        }
+        engine.push(engine_line);
+    }
+    engine
+}
+
+fn find_numbers_next_to_coord(numbers: &Vec<Number>, row: usize, col:usize) -> Vec<usize> {
+    let mut indices : Vec<usize> = Vec::new();
+
+    for n_id in 0..numbers.len() {
+        let start_row : usize = if numbers[n_id].row > 0 {
+            numbers[n_id].row - 1
+        } else {
+            numbers[n_id].row 
+        };
+        let start_col : usize = if numbers[n_id].col > 0 {
+            numbers[n_id].col - 1
+        } else {
+            numbers[n_id].col
+        };
+        
+        let end_row : usize = numbers[n_id].row + 1;
+        let end_col = numbers[n_id].col + numbers[n_id].len;
+
+        if row >= start_row && row <= end_row &&
+           col >= start_col && col <= end_col {
+            indices.push(n_id);
+        }
+    }
+
+    indices
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let file_path = &args[1];
+    let input_data = fs::read_to_string(file_path).unwrap_or_else(
+        |_|{panic!("Can't read file {}", file_path)});
+
+
+    let engine = build_engine(input_data);
+    let numbers = get_numbers(&engine);
+
+    let mut result = 0;
+
+    for row in 0..engine.len() {
+        for col in 0..engine[0].len() {
+            if engine[row][col] != '*' {
+                continue;
+            }
+
+            let indices = find_numbers_next_to_coord(&numbers, row, col);
+            if indices.len() != 2 {
+                continue;
+            }
+
+            result += numbers[indices[0]].value * numbers[indices[1]].value;
+        }
+    }
+
+    println!("{}", result);
+}