From c01a96c05d90c62bcc074ae85a5b60b3ee71b65c Mon Sep 17 00:00:00 2001
From: wieerwill <robert.jeutter@gmx.de>
Date: Sat, 2 Dec 2023 11:08:06 +0100
Subject: [PATCH] solve Day02 in rust

---
 .gitignore             |  4 ++-
 Day02/rust/Cargo.toml  |  8 ++++++
 Day02/rust/src/main.rs | 57 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 Day02/rust/Cargo.toml
 create mode 100644 Day02/rust/src/main.rs

diff --git a/.gitignore b/.gitignore
index 00209f6..44baee0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -172,4 +172,6 @@ Cargo.lock
 **/*.rs.bk
 
 # MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
\ No newline at end of file
+*.pdb
+
+helper.md
\ No newline at end of file
diff --git a/Day02/rust/Cargo.toml b/Day02/rust/Cargo.toml
new file mode 100644
index 0000000..1ec6963
--- /dev/null
+++ b/Day02/rust/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "rust"
+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/Day02/rust/src/main.rs b/Day02/rust/src/main.rs
new file mode 100644
index 0000000..c4f65ea
--- /dev/null
+++ b/Day02/rust/src/main.rs
@@ -0,0 +1,57 @@
+use std::fs::File;
+use std::io::{self, BufRead};
+use std::path::Path;
+use std::collections::HashMap;
+
+fn parse_game_data(line: &str) -> (i32, HashMap<String, i32>) {
+    let parts: Vec<&str> = line.split(": ").collect();
+    let game_id = parts[0].split_whitespace().nth(1).unwrap().parse::<i32>().unwrap();
+    let mut color_counts = HashMap::new();
+    color_counts.insert("red".to_string(), 0);
+    color_counts.insert("green".to_string(), 0);
+    color_counts.insert("blue".to_string(), 0);
+
+    let subsets = parts[1].split("; ");
+    for subset in subsets {
+        let colors = subset.split(", ");
+        for color in colors {
+            let color_parts: Vec<&str> = color.split_whitespace().collect();
+            let count = color_parts[0].parse::<i32>().unwrap();
+            let color_name = color_parts[1];
+            let max_count = color_counts.get(color_name).unwrap_or(&0).max(&count);
+            color_counts.insert(color_name.to_string(), *max_count);
+        }
+    }
+
+    (game_id, color_counts)
+}
+
+fn calculate_power_of_set(game_data: &HashMap<String, i32>) -> i32 {
+    game_data.get("red").unwrap_or(&0) * game_data.get("green").unwrap_or(&0) * game_data.get("blue").unwrap_or(&0)
+}
+
+fn process_games(file_path: &Path) -> i32 {
+    let file = File::open(file_path).unwrap();
+    let reader = io::BufReader::new(file);
+
+    let mut sum_of_powers = 0;
+    for line in reader.lines() {
+        let line = line.unwrap();
+        let (_, game_data) = parse_game_data(&line);
+        let power = calculate_power_of_set(&game_data);
+        sum_of_powers += power;
+    }
+
+    sum_of_powers
+}
+
+fn main() {
+    // Test the function with test data
+    let test_result = process_games(Path::new("../test.txt"));
+    assert_eq!(test_result, 2286, "Test failed: expected sum of powers to be 2286, but got {}", test_result);
+    println!("Test Passed: Sum of powers for the minimum cube sets is {}\n", test_result);
+
+    // Process the actual input file
+    let result = process_games(Path::new("../input.txt"));
+    println!("From input.txt: Sum of powers for the minimum cube sets is {}", result);
+}