#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#include<math.h>
#include<set>
#define all(x) x.begin(),x.end()
#define gall(x) x.begin(),x.end(),greater<>()
#define pb push_back
#define ll long long 
#define P pair<double,double>
#define LP pair<ll,ll>
using namespace std;


int main() {
	string s;
	cin >> s;
	int cnt = 0;
	for (int i =0; i < s.size(); i++) {
		if (s[i] == '1') cnt++;
	}
	bool f = 1;
	if (cnt == 1) f = 0;
	if (f) cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}