#include<iostream>
using namespace std;
int main()
{
    cin >> n;
	if (n<0)
	{
		cout << "-";
		n = -n;
	}
	for (; n; n/=10)
	{
		ans = n % 10 + ans * 10;
		//cout << ans<<' ';
	}
	cout << ans;
	return 0;
}