#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <utility>
using namespace std;

int main(void) {
	int count = 0;
	string str;
	cin >> str;
	if (str[0] != '0')
		cout << str << 0 << endl;
	else
		cout << 0 << endl;
	return 0;
}