#include <bits/stdc++.h>
using namespace std;
int main(){
    string s;
    cin>>s;
    int n=(int)s.size();
    vector<vector<pair<int,int>>> tank(2);
    int l=0;
    char c=s[0];
    for(int i=1;i<n;i++){
        if(s[i]!=c){
            tank[c-'0'].push_back({l,i});
            l=i;
            c=s[i];
        }
        if(i==n-1){
            tank[s[i]-'0'].push_back({n,l});
        }
    }
    if(tank[1].size()>2){
        cout<<"No"<<endl;
    }else if(tank[1].size()==2){
        for(int i=0;i<2;i++){
            if(tank[1][i].second-tank[1][i].first==1)continue;
            cout<<"No"<<endl;
            return 0;
        }
        cout<<"Yes"<<endl;
        return 0;
    }else if(tank[1].size()==1){
        if(tank[1][0].second-tank[1][0].first==1){
            cout<<"No"<<endl;
	        return 0;
        }
        cout<<"Yes"<<endl;
    }else{
        cout<<"No"<<endl;
    }
}