Solution in C++


  • 0
    W
    class Solution {
    public:
        int reverse(int x) {
            int y =  x % 10;
            int z = x, w;
            x /= 10;
            while (x != 0)
            {
                w = y;
                y *= 10;
                
                // check *
                if (y/10 != w)
                    return 0;
                
                y +=  x % 10;
                x /= 10;
            }
            
             // check +
            int sign = (y >> 31) & 0x1;
            if (( z>0 && sign == 1) || ( z<0 && sign == 0))
                return 0;
    
            return y;
        }
    };
    

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