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