#include "friend.h"
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int findSample(int n, int c[], int h[], int p[]) {
int ans = 0;
for (int i = n - 1;i > 0;i--) {
if (p[i] == 0) {
ans += c[i];
c[h[i]] = max(0, c[h[i]] - c[i]);
}
else if (p[i] == 1) {
c[h[i]] += c[i];
}
else {
c[h[i]] = max(c[h[i]], c[i]);
}
}
return ans + c[0];
}
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