Day 4 Part 1

rust/day4/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc-day4"
+version = "0.1.0"

rust/day4/Cargo.toml

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+[package]
+name = "aoc-day4"
+version = "0.1.0"
+edition = "2021"
+authors = ["Yohan Boujon <yoboujon@gmail.com>"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[workspace]

rust/day4/exemple

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+2-4,6-8
+2-3,4-5
+5-7,7-9
+2-8,3-7
+6-6,4-6
+2-6,4-8

rust/day4/src/main.rs

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+use std::fs::read_to_string;
+
+fn convert(vec: &Vec<&str>, index: usize, str_index: usize) -> u32 {
+    let two_num: Vec<&str> = vec[index].split("-").collect();
+    two_num[str_index].parse().unwrap()
+}
+
+fn first_part(str: &String) {
+    let mut count = 0;
+    let pairs: Vec<Vec<&str>> = str
+        .split("\r\n")
+        .map(|ch| ch.split(",").collect())
+        .collect();
+    for pair in &pairs {
+        if convert(pair, 0, 0) <= convert(pair, 1, 0) && convert(pair, 0, 1) >= convert(pair, 1, 1)
+            || convert(pair, 0, 0) >= convert(pair, 1, 0)
+                && convert(pair, 0, 1) <= convert(pair, 1, 1)
+        {
+            count += 1;
+        }
+    }
+    println!("Final Count: {}", count);
+}
+
+fn main() {
+    let file_content = read_to_string("input").unwrap();
+    first_part(&file_content);
+}