#include<iostream>
using namespace std;
int main()
{
    int n;
    int sum=0;
 
    cin>>n;
    if(n<0)
    {
        cout<<"-";
        n=-n;
    }
    while(n)
    {
        sum=sum*10+n%10;
        n/=10;
    }
    cout<<sum<<endl;
    return 0;
}