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

/**************************************************************
	Problem: 1121
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/