#include "friend.h"
#include<bits/stdc++.h>
using namespace std;
const int maxn = 4050;
const int inf = 1e9;
int n, pd[maxn], V[maxn], dp[maxn], c[maxn], a[maxn], type[maxn];
vector<int> t[maxn];
int par[maxn];
int dfs(int v){
if (type[v] == 1){
int lc = t[v][0], rc = t[v][1];
dfs(lc);
dfs(rc);
dp[v] = dp[lc]+pd[rc];
pd[v] = pd[lc]+dp[rc];
dp[v] = max(dp[v],pd[v]);
}
else{
dp[v] = c[v];
for (auto u : t[v]){
dfs(u);
dp[v] += dp[u];
pd[v] += pd[u];
}
dp[v] = max(dp[v],pd[v]);
}
return dp[v];
}
void addEdge(int v, int u){
t[v].push_back(u);
par[u] = v;
}
int findSample(int N,int confidence[],int host[],int protocol[]){
n = N;
for (int i = 0; i < n; i++)
c[i] = confidence[i];
if (*min_element(protocol+1, protocol+n) == 2 and *max_element(protocol+1, protocol+n) == 2)
return *max_element(confidence, confidence+n);
int newint = n+1;
addEdge(0, 1);
V[0] = 1;
c[0] = confidence[0];
for (int i = 1; i < n; i++){
int v = V[host[i]];
if (protocol[i] == 0){
type[v] = 1;
addEdge(v, newint++);
addEdge(v, newint++);
V[host[i]] = newint-1;
addEdge(v, newint++);
addEdge(v, newint++);
V[i] = newint-1;
c[V[i]] = confidence[i];
c[V[host[i]]] = confidence[host[i]];
}
else{
addEdge(par[v], newint++);
V[i] = newint-1;
}
}
return dfs(0);
}
