#include <bits/stdc++.h>
#include "friend.h"
using namespace std;
int colour[100001], dp[2][100001], c[100001];
vector<int> graph[100001];
void dfs(int node) {
dp[0][node] = c[node];
for (int i : graph[node]) {
dfs(i);
if (!colour[i])
dp[1][node] += dp[0][i], dp[0][node] += dp[1][i];
else if (colour[i] == 1)
dp[0][node] += dp[0][i], dp[1][node] += dp[1][i];
else
dp[1][node] += dp[1][i];
}
int curr = dp[1][node];
dp[0][node] = max(dp[0][node], curr);
for (int i : graph[node]) {
if (!colour[i])
curr += dp[1][i] - dp[0][i];
else
curr += dp[0][i] - dp[1][i];
dp[0][node] = max(dp[0][node], curr);
if (colour[i] == 2) curr += dp[1][i] - dp[0][i];
}
}
int findSample(int n, int confidence[], int host[], int protocol[]) {
c[0] = confidence[0];
for (int i = 1; i < n; i++) {
c[i] = confidence[i];
colour[i] = protocol[i];
graph[host[i]].push_back(i);
}
dfs(0);
return dp[0][0];
}
