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