#include<stdio.h>
#include<math.h>
#pragma warning(disable:4996) 
int main()
{
    int num,temp=0;
    scanf("%d",&num);
    do
    {
        temp = temp * 10 + num % 10;
        num /= 10;
    } while (num);
    printf("%d", temp);
    return 0;
}