#include <bits/stdc++.h>
using namespace std;

int main()
{
    string n;
    cin >> n;
    if (n[0] == '0')
    {
        cout  << "0" << endl;
    }
    else
    {
        cout << n << "0" << endl;
        
    }
    // system("pause");
    return 0;
}