text: class Solution {
  public:
      int reverse(int x) {
          int rev = 0;
          while (x!=0) {
              int pop = x % 10;
              x /= 10;
              // to check that it may not overflow integer range
              if (rev > INT_MAX/10 || (rev == INT_MAX / 10 && pop > 7)) return 0;
              if (rev < INT_MIN/10 || (rev == INT_MIN / 10 && pop < -8)) return 0;
              rev = rev * 10 + pop;
          }
          return rev;
      }
  };
  
  