其实有很多坑的

#include<iostream>
#include<string>
int main(){
stdstring a;
stdcin>>a;
bool flag = true;
int len = a.size();
if(a[0] == '-'){
stdcout<<"-";
flag = 0;
}
bool flag1 = true;
for(int i = len-1;i>=0;i--){
if(a[i] == '0' && flag1 == true){
continue;
}else{
flag1 = 0;
}
if(i == 0 && flag == 0){
continue;
}
stdcout<<a[i];
}
return 0;
}