#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';
  }
  bool ok = true;
  for (int i = 0; i < s.size() - 1; i++) {
    if (s[i] == '0' && s[i + 1] == '1') ok = false;
  }
  if (cnt <= 1) {
    cout << "No" << endl;
  } else if (cnt == 2) {
    cout << "Yes" << endl;
  } else {
    if (ok) {
      cout << "Yes" << endl;
    } else {
      cout << "No" << endl;
    }
  }
  return 0;
}