Change 167-Two-Sum-II.rs

Author: zim0369

rust/167-Two-Sum-II.rs

@@ -1,19 +1,15 @@
+use std::cmp::Ordering::{Equal, Greater, Less};
+
 impl Solution {
     pub fn two_sum(numbers: Vec<i32>, target: i32) -> Vec<i32> {
         let (mut l, mut r) = (0, numbers.len() - 1);
-        
-        while l < r{
-            let sum = numbers[l] + numbers[r];
-            
-            if sum > target{
-                r-=1;
-            }else if sum < target{
-                l+=1;
-            }else{
-                return vec![(l + 1) as i32, (r + 1) as i32];
+        while l < r {
+            match (numbers[l] + numbers[r]).cmp(&target) {
+                Less => l += 1,
+                Greater => r -= 1,
+                Equal => return vec![l as i32 + 1, r as i32 + 1],
             }
         }
-        
-        unreachable!()
+        unreachable!("Test did not follow the constraints!")
     }
-}
+}