#include <bits/stdc++.h>
using namespace std;
int main(){
  string N;
  cin >> N;
  int L = N.size();
  int cnt = 0;
  bool ok = true;
  for (int i = 0; i < L; i++){
    if (N[i] == '1'){
      cnt++;
    }
  }
  for (int i = 0; i < L; i++){
    if (N[i] == '0' && N[i + 1] == '1'){
      ok = false;
    }
  }
  if (cnt == 2 || (cnt >= 2 && ok)){
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}