#include<stdio.h>
int main()
{
long int a,b,i,k,n,sum=0;-
scanf("%d",&n);
for(i=0,sum=n%10,k=n;1;i++) 
{
	n=n/10;
	if(n==0)break;
	k=n%10;
	sum=sum*10+k;

}
printf("%d",sum);
	return 0;
 }