#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <algorithm>

int main(void) {

	//std::ifstream inf("Text.txt");	std::cin.rdbuf(inf.rdbuf());

	std::string S;
	std::cin >> S;

	if (S[0] == '0') {
		std::cout << S << std::endl;
	}
	else {
		std::cout << S + '0' << std::endl;
	}

	return 0;
}