Untitled

#include <iostream>
#include <cmath>
#include <string>
#include <vector>
using namespace std;


int main()
{
	string s;
	cin >> s;
	int a;
	a = s.length();
	for (int i = 0;a>i ; i++)
	{
		if (s[i] == '0') {
			s[i] = '1';
		}
	}
	cout << s;

}