#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 = 25000;
const int off = 1 << 18;
struct node {
int val, lazy;
node *l, *r;
node(int _val) : val(_val) {
lazy = 0;
l = nullptr;
r = nullptr;
}
};
void prop(node *no, int x, int y) {
if (no == nullptr) return;
no->val += no->lazy;
if (x != y and no->lazy) {
if (no->l == nullptr) no->l = new node(0);
if (no->r == nullptr) no->r = new node(0);
no->l->lazy += no->lazy;
no->r->lazy += no->lazy;
}
no->lazy = 0;
}
node* update(node *no, int l, int r, int delta, int x = 0, int y = off - 1) {
if (x > r or l > y) return no;
if (no == nullptr) no = new node(0);
if (l <= x and y <= r) {
no->lazy += delta;
prop(no, x, y);
return no;
}
prop(no, x, y);
no->l = update(no->l, l, r, delta, x, (x + y) / 2);
no->r = update(no->r, l, r, delta, (x + y) / 2 + 1, y);
no->val = 0;
if (no->l != nullptr) no->val += no->l->val;
if (no->r != nullptr) no->val += no->r->val;
return no;
}
int query(node *no, int tar, int x = 0, int y = off - 1) {
if (no == nullptr) return 0;
if (x > tar or tar > y) return 0;
prop(no, x, y);
if (tar == x and y == tar) return no->val;
return query(no->l, tar, x, (x + y) / 2) + query(no->r, tar, (x + y) / 2 + 1, y);
}
int n, r, q;
int h[N];
int par[N];
vector<int> chi[N];
vector<int> emp[R];
node* tr[R];
int in[N];
int out[N];
int timer;
void dfs(int node) {
timer++;
in[node] = timer;
for (int u : chi[node]) {
dfs(u);
}
out[node] = timer;
}
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];
emp[h[i]].pb(i);
}
for (int i = 1; i <= r; i++) {
tr[i] = new node(0);
}
dfs(1);
for (int i = 1; i <= n; i++) {
update(tr[h[i]], in[i], out[i], 1);
}
for (int i = 0; i < q; i++) {
int r1, r2;
cin >> r1 >> r2;
int ans = 0;
for (int x : emp[r2]) {
ans += query(tr[r1], in[x]);
}
cout << ans << endl;
}
return 0;
}
