days 1-3

day02/Cargo.lock

@@ -0,0 +1,54 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aho-corasick"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "day02"
+version = "0.1.0"
+dependencies = [
+ "regex",
+]
+
+[[package]]
+name = "memchr"
+version = "2.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+
+[[package]]
+name = "regex"
+version = "1.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"

day02/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day02"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+regex = "1.10.2"

day02/src/main.rs

@@ -0,0 +1,61 @@
+use regex::Regex;
+use std::io::{stdin, BufRead};
+
+type Rgb = (usize, usize, usize);
+const THRESHOLD: Rgb = (12, 13, 14);
+
+fn main() {
+    let re = Regex::new(r"\d+ (b|r|g)").unwrap();
+    let input = stdin().lock().lines().map(|l| l.unwrap());
+    let mut id_sum = 0;
+    let mut water_sum = 0;
+
+    for (i, line) in input.enumerate() {
+        let mut possible = true;
+
+        let mut max_rgb = (0, 0, 0);
+        for line_sect in line.split(';') {
+            let mut rgb = (0, 0, 0);
+
+            let games = re
+                .find_iter(line_sect)
+                .map(|l| {
+                    let temp = l.as_str().split_once(' ').unwrap();
+                    (temp.0.parse::<usize>().unwrap(), temp.1)
+                })
+                .collect::<Vec<_>>();
+
+            for game in games.iter() {
+                match game.1 {
+                    "r" => rgb.0 = game.0,
+                    "g" => rgb.1 = game.0,
+                    "b" => rgb.2 = game.0,
+                    _ => (),
+                }
+                if rgb.0 > max_rgb.0 {
+                    max_rgb.0 = rgb.0;
+                }
+
+                if rgb.1 > max_rgb.1 {
+                    max_rgb.1 = rgb.1;
+                }
+
+                if rgb.2 > max_rgb.2 {
+                    max_rgb.2 = rgb.2;
+                }
+
+                if possible && rgb.0 > THRESHOLD.0 || rgb.1 > THRESHOLD.1 || rgb.2 > THRESHOLD.2 {
+                    possible = false;
+                }
+            }
+        }
+
+        let pow = max_rgb.0 * max_rgb.1 * max_rgb.2;
+        water_sum += pow;
+
+        if possible {
+            id_sum += i + 1;
+        }
+    }
+    println!("P1: {}, P2: {}", id_sum, water_sum);
+}