#include <bits/stdc++.h> using namespace std; char a[105];

int main() { cin >> a; int l = strlen(a); int n; for (int i = l - 1; i >= 0; i--) { if (i == n) { continue; }

	if (a[i] == '0' && a[i - 1] == '1') {
		cout << "10";
		n = i - 1;
	} else {
		cout << a[i];
	}

}

}