class Solution {public:    int reverse(int x) {        /*        1.-x可能溢出        2.x反转后也可能溢出        */        #include
    
             if(x==0x80000000 ) return 0;        if(x<0) return -reverse(-x);        string s=to_string(x);        std::reverse(s.begin(),s.end());        long long int val=stoll(s);        return val>0x7fffffff?0:val;    }};