#include <bits/stdc++.h>
#define endl '\n'
using namespace std;

const int N = 1e5 + 9;

vector<int> e[N];

bool flag;

int t, n, a[N], b;

int dfs(int u, int fa) {
	if (e[u].size() == 1 && e[u][0] == fa)
		return a[u];
	int ans = 0, p = 0;
	for (auto v : e[u]) {
		if (v != fa) {
			int x = dfs(v, u);
			if (x) {
				p++;
				ans += x;
			}
		}
	}
	ans += a[u];
	if (p > 2 || (ans != b && p > 1))
		flag = false;
	return ans;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> t;
	while (t--) {
		flag = true;
		cin >> n;
		for (int i = 1; i <= n; i++) {
			cin >> a[i];
			e[i].clear();
			b += a[i];
		}
		for (int i = 1; i <= n - 1; i++) {
			int x, y;
			cin >> x >> y;
			e[x].push_back(y);
			e[y].push_back(x);
		}
		dfs(1, 0);
		if (flag)
			cout << "Yes" << endl;
		else
			cout << "No" << endl;
	}
	return 0;
}