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

/**************************************************************
	Problem: 1121
	User: fzy001
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/