#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,h=0;
    cin>>n;
    while(n!=0){
        h=h*10+n%10;
        n=n/10;
    }
    cout<<h;
}
/**************************************************************
	Problem: 1121
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/