7-reverse-integer.cpp

class Solution {
public:
    int reverse(int n) {
        int ans = 0;
        while(n!=0)
        {
            int digit = n% 10;
            if ( (ans > INT_MAX/10) || (ans < INT_MIN/10) )
                return 0;
            ans = (ans*10)+digit;
            n = n/10;
        }
        
            return ans;
        
    }
};