Fixed sonar

Author: javadev

src/main/kotlin/g3301_3400/s3395_subsequences_with_a_unique_middle_mode_i/Solution.kt

@@ -20,7 +20,7 @@ class Solution {
         var m = 0
         var index = 0
         for (x in nums) {
-            var id = map.get(x)
+            var id = map[x]
             if (id == null) {
                 id = m++
                 map.put(x, id)