fix: $1371(#402)

Author: Alexzzl

problems/1371.find-the-longest-substring-containing-vowels-in-even-counts.md

@@ -159,11 +159,11 @@ class Solution {
         for (int i = len - 1; i >= 0; i--) {
 
             for (int j = 0; j < len - i; j++) {
-                if (checkValid(preSum, s, i, i + j))
-                    return i + 1
+                if (checkValid(preSum, s, j, i + j))
+                    return i + 1;
             }
         }
-        return 0
+        return 0;
     }