#include "friend.h"
#include<bits/stdc++.h>
using namespace std;
template <class A, class B> bool maximize(A &a, B b) { if (a < b) { a = b; return true; } return false; }
int findSample(int n, int confidence[], int host[], int protocol[]){
vector <vector <int>> dp(n, vector<int>(2, 0));
for(int i = 0; i < n; i++)dp[i][1] = confidence[i];
for (int i = (n), _a = (1); --i >= _a; ) {
if (!protocol[i]) {
dp[host[i]][0] += max(dp[i][0], dp[i][1]);
dp[host[i]][1] += dp[i][0];
} else if (protocol[i] == 1) {
dp[host[i]][1] += max(dp[i][0], dp[i][1]);
dp[host[i]][1] = max(dp[host[i]][1], dp[host[i]][0] + dp[i][1]);
dp[host[i]][0] += dp[i][0];
} else {
dp[host[i]][1] += dp[i][0];
dp[host[i]][1] = max(dp[host[i]][1], dp[host[i]][0] + dp[i][1]);
dp[host[i]][0] += dp[i][0];
}
}
return max(dp[0][0], dp[0][1]);
}
