day 1: part 2: rust

2024/days/01/part1/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "part1"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

2024/days/01/part1/src/main.rs

@@ -0,0 +1,48 @@
+
+fn vec_minimum(vec: &Vec<u64>) -> (usize, u64) {
+    let mut m: u64 = u64::MAX;
+    let mut index: usize = 0;
+    for (i, value) in vec.iter().enumerate() {
+        if *value < m {
+            m = *value;
+            index = i;
+        }
+    }
+    (index, m)
+}
+
+fn vec_distance(nums1: Vec<u64>, nums2: Vec<u64>) -> u64 {
+    let mut nums1 = nums1.clone();
+    let mut nums2 = nums2.clone();
+    let mut distance: u64 = 0;
+    while nums1.len() > 0 {
+        let (idx1, min1) = vec_minimum(&nums1);
+        let (idx2, min2) = vec_minimum(&nums2);
+        let d = (min1 as i64 - min2 as i64).abs() as u64;
+        distance += d;
+        nums1.remove(idx1);
+        nums2.remove(idx2);
+    }
+    distance
+}
+
+fn main() -> std::io::Result<()> {
+    let mut nums1: Vec<u64> = Vec::new();
+    let mut nums2: Vec<u64> = Vec::new();
+    for line in std::io::stdin().lines() {
+        let line = line.unwrap();
+        if line == "" {
+            continue;
+        }
+        let mut parts = line.split("   ");
+        let num1 = parts.next().unwrap();
+        let num1: u64 = num1.parse().unwrap();
+        let num2 = parts.next().unwrap();
+        let num2: u64 = num2.parse().unwrap();
+        nums1.push(num1);
+        nums2.push(num2);
+    }
+    let distance = vec_distance(nums1, nums2);
+    println!("{}", distance);
+    Ok(())
+}

2024/days/01/part2/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "part2"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

2024/days/01/part2/src/main.rs

@@ -0,0 +1,36 @@
+
+fn similarity(nums1: &Vec<u64>, nums2: &Vec<u64>) -> u64 {
+    let mut s = 0;
+    for num1 in nums1 {
+        let mut count: u64 = 0;
+        for num2 in nums2 {
+            if *num1 == *num2 {
+                count += 1;
+            }
+        }
+        s += num1 * count;
+    }
+    s
+}
+
+
+fn main() -> std::io::Result<()> {
+    let mut nums1: Vec<u64> = Vec::new();
+    let mut nums2: Vec<u64> = Vec::new();
+    for line in std::io::stdin().lines() {
+        let line = line.unwrap();
+        if line == "" {
+            continue;
+        }
+        let mut parts = line.split("   ");
+        let num1 = parts.next().unwrap();
+        let num1: u64 = num1.parse().unwrap();
+        let num2 = parts.next().unwrap();
+        let num2: u64 = num2.parse().unwrap();
+        nums1.push(num1);
+        nums2.push(num2);
+    }
+    let s = similarity(&nums1, &nums2);
+    println!("{}", s);
+    Ok(())
+}