Time: 2 ms (42.58%), Space: 6 MB (30.84%) - LeetHub

Author: anand-3399

1009-complement-of-base-10-integer/1009-complement-of-base-10-integer.cpp

@@ -1,15 +1,20 @@
 class Solution {
 public:
     int bitwiseComplement(int n) {
+        
         int m = n;
         int mask = 0;
+        
+        // Exception case
         if (n == 0)
             return 1;
+        
         while(m!=0)
         {
             mask = (mask << 1) | 1;
             m = m >> 1;
         }
+        
         int ans = (~n) & mask;
         return ans;
     }