complete 1644.rs 2887.rs 15552.rs 24767.rs 25710.rs 34031.rs

storage/zeta/rs/completed/25710.rs

@@ -0,0 +1,57 @@
+use std::io::stdin;
+
+fn get_score(a: u32, b: u32) -> u32 {
+    let mut k = a * b;
+    vec![100000, 10000, 1000, 100, 10, 1]
+        .iter()
+        .map(|&x| {
+            let t = k / x;
+            k %= x;
+            t
+        })
+        .sum()
+}
+
+fn get_mult_score(a: &Vec<u32>) -> u32 {
+    let mut a_cnt = vec![0; 1000];
+    for item in a {
+        a_cnt[*item as usize] += 1;
+    }
+
+    a_cnt
+        .iter()
+        .enumerate()
+        .flat_map(|(ia, &ca)| {
+            a_cnt
+                .iter()
+                .enumerate()
+                .skip(ia)
+                .map(|(ib, &cb)| (ia, ca, ib, cb))
+                .collect::<Vec<_>>()
+        })
+        .map(|(ia, ca, ib, cb)| {
+            if ca == 0 || cb == 0 {
+                0 as u32
+            } else if ia == ib && ca <= 1 {
+                0 as u32
+            } else {
+                get_score(ia as u32, ib as u32)
+            }
+        })
+        .max()
+        .unwrap_or(0)
+}
+
+fn main() {
+    let mut lines = stdin().lines();
+    lines.next();
+    let a: Vec<u32> = lines
+        .next()
+        .unwrap()
+        .unwrap()
+        .split_whitespace()
+        .map(|x| x.parse::<u32>().unwrap())
+        .collect();
+
+    println!("{}", get_mult_score(&a));
+}