Create 1742-maximum-number-of-balls-in-a-box.rs

Author: memorycancel

1742-maximum-number-of-balls-in-a-box.rs

@@ -0,0 +1,15 @@
+pub fn count_balls(low_limit: i32, high_limit: i32) -> i32 {
+    use std::collections::HashMap;
+    let mut mmp = HashMap::new();
+    for i in low_limit ..= high_limit {
+        let a = i.to_string().chars().map(|e|e.to_string().parse::<i32>().unwrap()).sum::<i32>();
+        mmp.entry(a).and_modify(|e|*e += 1).or_insert(1);
+    }
+    mmp.into_values().into_iter().max().unwrap()
+}
+
+fn main() {
+    println!("{:?}", count_balls(1, 10));
+    println!("{:?}", count_balls(5, 15));
+    println!("{:?}", count_balls(19, 28));
+}