#include<bits/stdc++.h>
using namespace std;
int main(){
    string a;
    cin>>a;
    if(a[0]=='-'){
        cout<<'-';
        for(int i=a.length()-1;i>=1;i--){
            if(a[a.length()-1]=='0'&&i==a.length()-1)continue;
            cout<<a[i];
        }
    }
    else{
        for(int i=a.length()-1;i>=0;i--){
            if(a[a.length()-1]=='0'&&i==a.length()-1)continue;
            cout<<a[i];
        }
    }
    return 0;
}