#include <stdio.h>
#include <math.h>
#include <string.h>
#include <limits.h>
#include <stdlib.h>
#include <algorithm>
#include <iostream>
#include <utility>
#include <vector>
#include <string>
#include <unordered_map>
#include <map>
#include <queue>
#include <set>
#include <stack>
using namespace std;
#define fi first
#define se second
typedef pair<int,int> ii;
int n;
int A[100003], T[100003], H[100003];
bool task2 = 1, task3 = 1, task4 = 1;
int dp[100003][2];
vector<int> chi[100003];
void dfs_tree(int u)
{
int sum0 = 0, sum1 = 0;
for(int v : chi[u])
{
dfs_tree(v);
sum0 += dp[v][0];
sum1 += max(dp[v][0],dp[v][1]);
}
dp[u][0] = sum1;
dp[u][1] = sum0+A[u];
}
int solve_tree()
{
for(int i = 1; i < n; i++)
chi[H[i]].push_back(i);
dfs_tree(0);
return max(dp[0][1], dp[0][0]);
}
int solve(int task)
{
int sum = 0;
int mx = 0;
for(int i = 0; i < n; i++)
{
sum += A[i];
mx = max(mx, A[i]);
}
if(task == 2) return sum;
if(task == 3) return mx;
if(task == 4) return solve_tree();
return -1;
}
// Find out best sample
int findSample(int N,int confidence[],int host[],int protocol[])
{
n = N;
for(int i = 0; i < n; i++)
A[i] = confidence[i];
for(int i = 1; i < n; i++)
{
T[i] = protocol[i], H[i] = host[i];
if(T[i] != 1) task2 = 0;
if(T[i] != 2) task3 = 0;
if(T[i] != 0) task4 = 0;
// printf("%d\n", T[i]);
}
if(task2) return solve(2);
if(task3) return solve(3);
if(task4) return solve(4);
return -1;
}
