#pragma region Macros

#include <bits/extc++.h>
using namespace std;
using namespace __gnu_pbds;
// using namespace __gnu_cxx;

#define TO_STRING(var) # var
#define pb emplace_back
#define int ll
#define endl '\n'

using ll = long long;
using ld = long double;
const ld PI = acos(-1);
const ld EPS = 1e-10;
const int INF = 1 << 30;
const ll INFL = 1LL << 62;
const int MOD = 998244353;
// const int MOD = 1000000007;

int ceil(int x, int y) {return (x > 0 ? (x + y - 1) / y : x / y);}
int POW(int x, int y) {
    if (y != (int)(y) or y < 0 or x != 0 && x != 1 && y > 64) {cout << "Error" << endl;return 0;}
    if (y == 0) return 1;
    if (y % 2 == 0) return POW(x * x, y / 2);
    return x * POW(x, y - 1);
}

__attribute__((constructor))
void constructor() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(15);
}

#pragma endregion

vector<pair<char, int>> rle(string s) {
    vector<pair<char, int>> res;
    
    int cnt = 1;
    for(int i = 1; i < (int)s.size(); i++){
        if(s[i] != s[i - 1]){
            res.push_back({s[i - 1], cnt});
            cnt = 0;
        }
        cnt++;
    }
    res.push_back({s.back(), cnt});

    return res;
}

signed main() {
    string S;
	cin >> S;
	int N = S.size();

	vector<pair<char,int>> V = rle(S);
	int sz = V.size();

	vector<int> A;
	for (int i = 0; i < sz; i++) {
		if (V[i].first == '1') A.pb(V[i].second);
	}

	if (A.size() == 2 && A[0] == 1 && A[1] == 1) cout << "Yes" << endl;
	else if (A.size() == 1 && A[0] != 1)  cout << "Yes" << endl;
	else cout << "No" << endl;
}