#include<stdio.h>
int reverse_num(int num)
{
    int mod,total=0;
    while(num!=0)
   {
       mod=num%10;
       total=total*10+mod;
       num=num/10;
   }
   return total;
}
int main()
{
    int num,total;
    scanf("%d",&num);
    total=reverse_num(num);
    printf("%d",total);
    return 0;
}