#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: wengsihan
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/