#include <bits/stdc++.h>

using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second
 
typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef double db;

void solve()
{
	int n;
	cin >> n;
	VI d(n);
	FOR(i, 1, n)
	{
		int f;
		cin >> f;
		f--;
		d[i] = d[f] + 1;
	}
	VI a(n);
	FOR(i, 0, n)
	{
		cin >> a[i];
		a[i] += i + 1;
	}
	sort(ALL(d));
	sort(ALL(a), greater());
	int ans = 0;
	FOR(i, 0, n)
	{
		ans = max(ans, a[i] + d[i]);
	}
	cout << ans << "\n";
}

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	int t;
	cin >> t;
	while(t--)
	{
		solve();
	}
	return 0;
}