add: files so far

d/d1p1.rs

@@ -0,0 +1,22 @@
+use std::collections::BinaryHeap;
+use std::io;
+
+fn main() -> io::Result<()> {
+    let mut l1 = BinaryHeap::<u64>::new();
+    let mut l2 = BinaryHeap::<u64>::new();
+    for line in io::stdin().lines() {
+        let line = line?;
+        let parts: Vec<&str> = line.trim().split_whitespace().collect();
+        let (n1, n2) = (parts[0], parts[1]);
+        l1.push(n1.parse().unwrap());
+        l2.push(n2.parse().unwrap());
+    }
+    let l1 = l1.into_sorted_vec();
+    let l2 = l2.into_sorted_vec();
+    let mut sum = 0;
+    for (n1, n2) in l1.into_iter().zip(l2.into_iter()) {
+        sum += n1.abs_diff(n2);
+    }
+    println!("{}", sum);
+    Ok(())
+}