50分求助

代码:

#include<bits/stdc++.h>
#define int long long
using namespace std;
//const int N= ;
signed main(){
//  freopen("test.in","r",stdin);
//  freopen("test.out","w",stdout);
    string s;
    cin>>s;
    if(s[0]=='-'){
        reverse(s.begin()+1,s.end());
        cout<<'-';
        int id=0;
        while(s[id++]=='0'){
        }
        for(int i=id+1;i<s.size();i++)cout<<s[i];
    }else{ 
        int id=-1;
        reverse(s.begin(),s.end());
        while(s[id++]=='0'){
        }
        for(int i=id;i<s.size();i++)cout<<s[i];
    }
    return 0;
}