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