iiitv/ChefLib

// Code written by Monal
#include "bits/stdc++.h"
 
using namespace std;
 
int main() {
    ios::sync_with_stdio(false);
    int tc;
    cin>>tc;
    while (tc--) {
        string s;
        cin>>s;
        vector<long int > occ;
        int nocc;
        for (int i=0;i<s.length();++i) {
            if (s[i]=='1') {
                nocc=0;
                while (s[i]=='1'&&i<s.length()) {i++; nocc++;}
                i--;
                occ.push_back(nocc);
            }
        }
        if (occ.size()==1)
            cout<<"YES\n";
        else
            cout<<"NO\n";
        occ.clear();
    }
    return 0;
}