#include<bits/stdc++.h>
using namespace std;
int main()
{
	long long n,i=0;
	cin>>n;
	while(n){
		i=i*10+n%10;
		n=n/10;
	}
	cout<<i; 
return 0;
}

/**************************************************************
	Problem: 1121
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/