#include "bits/stdc++.h"

typedef long long ll;

using namespace std;
int main() {
	cin.tie(0);
   	ios::sync_with_stdio(false);
//  --------------------------------------

	string N; cin >> N;
	if(N[0] == '0'){
		cout << 0 << "\n";
	}else{
		cout << N << 0 << "\n";
	}

}