#include <bits/stdc++.h>

#define f first
#define s second
#define pb push_back
#define mp make_pair

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;

const int N = 300500, inf = 1e9, mod = 998244353;
const ll INF = 1e18;

int sum(int a, int b) {
    a += b;
    if (a >= mod)
        a -= mod;
    return a;
}

int sub(int a, int b) {
    a -= b;
    if (a < 0)
        a += mod;
    return a;
}

int mult(int a, int b) {
    return 1ll * a * b % mod;
}

int bp(int a, int b) {
    int res = 1;
    while (b) {
        if (b & 1)
            res = mult(res, a);
        a = mult(a, a);
        b >>= 1;
    }
    return res;
}

int inv(int x) {
    return bp(x, mod - 2);
}

int n, b[N], c[N];
ll a[N];

void solve() {
    map<pii, int> mt;

    cin >> n;
    for (int i = 1; i <= n; i++)
        cin >> a[i];

    mt[{1, 2}] = 3;
    mt[{1, 3}] = 2;
    mt[{2, 3}] = 1;

    for (int i = 4; i <= n; i++) {
        cin >> b[i] >> c[i];
        mt[{b[i], i}] = c[i];
        mt[{c[i], i}] = b[i];
    }

    for (int i = n; i >= 4; i--) {
        int j = mt[{min(b[i], c[i]), max(b[i], c[i])}];
        a[j] += a[i];
    }
    cout << max({a[1], a[2], a[3]}) << "\n";
}

int main() {
#ifdef DEBUG
    freopen("input.txt", "r", stdin);
#endif
    ios_base::sync_with_stdio(false);
    int t = 1;
    cin >> t;
    for (int i = 1; i <= t; i++) {
//        cout << "Case #" << i << endl;
        solve();
    }
}