#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  int cnt = 0;
  for (int i = 0; i < s.size(); i++) {
    cnt += s[i] == '1';
  }
  cout << (cnt <= 2 ? "Yes" : "No") << endl;
  return 0;
}