#include <bits/stdc++.h>
#include "tree.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;
int n;
std::vector<int> p, w;
int k;
void init(std::vector<int> P, std::vector<int> W) {
p = P;
w = W;
n = (int)p.size();
vector<vector<int>> adj(n);
for (int i=1; i<n; i++) {
int a = i;
int b = p[i];
adj[a].push_back(b);
adj[b].push_back(a);
}
k=0;
for (int i=0; i<n; i++) {
if (adj[i].size()==1) k++;
}
}
long long query(int L, int R) {
return k*L+(max(0, k*L-R));
}
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