```cpp
#include<cstdio>
#include<iostream>
#include<cstring>
#include<string>
#include<algorithm>
#include<cmath>
using namespace std;
int main()
{
string s;
int o=0;
bool bo=1;
cin>>s;
if(s[0]=='-')
{
cout<<'-';
o=1;
}
for(int i=s.size()-1;i>=o;i--)
{
if(bo&&s[i]=='0')
continue;
else
{
bo=0;
cout<<s[i];
}
}
cout<<endl;
return 0;
}
```
by jzy_go @ 2017-08-12 20:44:50