#include<iostream>
#include<string>
using namespace std;
int main() {
	char N[25];
	cin >> N;
	if (N[0] == '0') {
		cout << N << endl;
	}
	else {
		for (int i = 1; i < 25; i++) {
			if (N[i] == '\0') {
				N[i] = (char)48;
				N[i + 1] = '\0';
				break;
			}
		}
		cout << N << endl;
	}
	return 0;
}