Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0.Assume the environment does not allow you to store 64-bit integers (signed or unsigned).

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Solution 1

C++

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