codechef/AjdacentSumParity/main.cpp


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#include<bits/stdc++.h>

using namespace std;

int main () {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int tt;
	cin >> tt;
	while(tt--){
    int n;
    cin >> n;
    vector<int> v(n);
    int sum = 0;
    for(int &x : v) {
      cin >> x;
      sum += x;
    }
    if(sum % 2 == 0) {
      cout << "YES" << endl;
    } else {
      cout << "NO" << endl;
    }

	}
}