#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pii;
#define all(x) x.begin(), x.end()
#define sz(x) ((int) ((x).size()))
#define pb push_back
#define F first
#define S second
#define FIO ios_base::sync_with_stdio(false); cin.tie(0)
const int N = 200100;
const int R = 510;
int n, r, q;
int h[N];
int par[N];
vector<int> chi[N];
int in[N];
int out[N];
int timer;
int cnt[R][R];
vector<int>* dfs(int node) {
timer++;
in[node] = timer;
vector<int>* cur = nullptr;
for (int u : chi[node]) {
vector<int>* v = dfs(u);
if (cur == nullptr) {
cur = v;
} else {
for (int i = 1; i < R; i++) {
(*cur)[i] += (*v)[i];
}
delete(v);
}
}
if (sz(chi[node]) == 0) {
cur = new vector<int>(R);
}
for (int i = 1; i < R; i++) {
cnt[h[node]][i] += (*cur)[i];
}
(*cur)[h[node]]++;
out[node] = timer;
return cur;
}
int main() {
FIO;
cin >> n >> r >> q;
for (int i = 1; i <= n; i++) {
if (i != 1) {
cin >> par[i];
chi[par[i]].pb(i);
}
cin >> h[i];
}
dfs(1);
for (int i = 0; i < q; i++) {
int r1, r2;
cin >> r1 >> r2;
int ans = cnt[r1][r2];
cout << ans << endl;
}
return 0;
}
