#include<bits/stdc++.h>
using namespace std;
char a[100];
int main(){
int i,f=1,x=0,fl=1;
scanf("%s",a);
for (i=strlen(a)-1;i>=x;i--){
if (a[0]=='-'&&fl){
cout<<'-';
x=1;
fl=0;
}
if (f==1){
if (a[i]=='0') continue;
else f=0;
}
cout<<a[i];
}
}
大家帮本蒟蒻看一看哪里错了?