CP-Problem/sol.cpp at main · Pallav-Rastogi/CP-Problem · GitHub

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#include <bits/stdc++.h>
using namespace std;

int main(){
    int flag;
    int flag2;
    int t;
    cin >> t;

    for(int test=0;test<t;test++){

        char arr[100];
        cin >> arr;

        flag = 0;
        flag2 = 0;

        for (int i = 0; arr[i] != '\0'; i++)
        {
            if (arr[i] != '0')
            {
                if (flag != 0)
                {
                    cout << "NO" << endl;
                    flag2 = 1;
                    break;
                }
                flag = 1;
            }

            else{
                flag = 0;
            }
        }

        if (flag2)
        {
            continue;
        }
        cout << "YES" << endl;

    }

    return 0;
}