#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;

string N;

int main() {
  cin >> N;
  int cnt = 0;
  for (int i = 0; i < N.size(); i++) {
    if (N[i] == '1') cnt++;
  }
  if (cnt == 1) cout << "No" << endl;
  else if (cnt == 2) cout << "Yes" << endl;
  else if (N.find("01") != -1) cout << "No" << endl;
  else cout << "Yes" << endl;
  return 0;
}