#include <stdio.h> 
  int main()
  {
  	long long i,m=0,n;
  	scanf ("%lld",&n);
	for (i=0;n!=0;i++)
	{
		m=m*10+n%10;
		n/=10;
	}
	
	printf ("%lld",m);
  	return 0;
   } 
/**************************************************************
	Problem: 1121
	User: admin
	Language: C
	Result: Accepted
	Time:10 ms
	Memory:1144 kb
****************************************************************/