A

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

#define ll long long

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

    while(t--)
    {

        int n;
        cin>>n;

        vector<int> a(n);
        for(auto &e: a)
            cin>>e;

        ll int tot = accumulate(a.begin(), a.end(), 0);

        if(tot%n != 0)
        {
            cout<<"No\n";
            continue;
        }

        int avg = tot/n;

        int f = 1;

        for(auto e: a)
            f &= (abs(e - avg)%2 == 0);

        if(f)       cout<<"Yes\n";
        else        cout<<"No\n";
    }
}