d4

day4/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day4"
+version = "0.1.0"

day4/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "day4"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

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day4/src/main.rs

@@ -0,0 +1,25 @@
+use std::env;
+use std::fs;
+
+fn main() {
+    let input = fs::read_to_string(&env::args().nth(1).unwrap()).unwrap();
+    let mut sum = 0;
+
+    for line in input.lines() {
+        let (s1, e1, s2, e2) = readline(line);
+        if s1 <= e2 && s2 <= e1 {
+            sum += 1;
+        }
+    }
+
+    println!("Total: {}", sum);
+}
+
+fn readline(line: &str) -> (i64, i64, i64, i64) {
+    let nums: Vec<i64> = line
+        .split(['-', ','])
+        .map(|line| line.parse::<i64>().unwrap())
+        .collect();
+    (nums[0], nums[1], nums[2], nums[3])
+}
+

day4/src/main1.rs

@@ -0,0 +1,25 @@
+use std::env;
+use std::fs;
+
+fn main() {
+    let input = fs::read_to_string(&env::args().nth(1).unwrap()).unwrap();
+    let mut sum = 0;
+
+    for line in input.lines() {
+        let (s1, e1, s2, e2) = readline(line);
+        if (s1 <= s2 && e1 >= e2) || (s1 >= s2 && e1 <= e2) {
+            sum += 1;
+        }
+    }
+
+    println!("Total: {}", sum);
+}
+
+fn readline(line: &str) -> (i64, i64, i64, i64) {
+    let nums: Vec<i64> = line
+        .split(['-', ','])
+        .map(|line| line.parse::<i64>().unwrap())
+        .collect();
+    (nums[0], nums[1], nums[2], nums[3])
+}
+

day4/test.txt

@@ -0,0 +1,6 @@
+2-4,6-8
+2-3,4-5
+5-7,7-9
+2-8,3-7
+6-6,4-6
+2-6,4-8