#include "friend.h"
#include <bits/stdc++.h>
#pragma GCC optimize ("O2,unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) {cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;}
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;
const int inf=1000000010;
const ll INF=10000000000000010LL;
const int mod=1000000007;
const int MAXN=100010, LOG=20;
int n, m, k, u, v, x, y, t, a, b, ans;
int dp[MAXN][2];
int findSample(int n,int confidence[],int host[],int protocol[]){
for (int i=0; i<n; i++) dp[i][0]=confidence[i];
for (int v=n-1; v; v--){
int u=host[v], t=protocol[v];
if (t==0){
dp[u][0]=max({dp[u][0], dp[u][1]+dp[v][0], dp[u][0]+dp[v][1]});
dp[u][1]+=dp[v][0];
}
if (t==1){
dp[u][0]+=dp[v][0];
dp[u][1]+=dp[v][1];
}
if (t==2){
int d0=dp[u][0], d1=dp[u][1];
dp[u][0]=max({d0, d1+dp[v][0], d0+dp[v][1]});
dp[u][1]+=dp[v][1];
}
}
return dp[0][0];
}
/*
7
1 1 1 1 1 1 1
0 0
1 0
2 0
1 0
1 0
0 0
4
1 1 1 1
0 0
1 0
0 0
*/
