#include <stdio.h>
#include <math.h>
int main()
{
int n;
int revers;
int copy;
scanf("%d",&n);
    copy=n;
while(copy>0)
    {
        revers=revers*10;
        revers=revers+(copy%10);
        copy/=10;
    }
    printf("%d",revers);
}