#include <bits//stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<long long, null_type, less<long long>, rb_tree_tag,
tree_order_statistics_node_update>
ordered_set;
typedef tree<long long, null_type, less_equal<long long>, rb_tree_tag,
tree_order_statistics_node_update>
ordered_multiset;
#define ll int
#define iloop(m, h) for (auto i = m; i != h; i += (m < h ? 1 : -1))
#define jloop(m, h) for (auto j = m; j != h; j += (m < h ? 1 : -1))
#define kloop(m, h) for (auto k = m; k != h; k += (m < h ? 1 : -1))
#define lloop(m, h) for (auto l = m; l != h; l += (m < h ? 1 : -1))
#define pll pair<ll, ll>
#define INF 1000000000000000
#define MOD1 1000000007
#define MOD2 998244353
#define MOD3 1000000009
ll n, m, q, t;
ll blk = 200;
ll a[200005];
vector<ll> p[25005];
ll res[205][25005];
vector<ll> adj[200005];
pll cnt[25005], rng[25005];
ll rep[25005];
ll ur[25005];
void dfs1(ll nd, ll ti, ll cc) {
res[rep[ti]][a[nd]] += cc;
if (a[nd] == ti) cc++;
for (auto it : adj[nd]) dfs1(it, ti, cc);
}
ll pre[200005], pos[200005], cid = 0;
void dfs2(ll nd) {
pre[nd] = cid;
cid++;
for (auto it : adj[nd]) dfs2(it);
pos[nd] = cid - 1;
}
struct node {
ll s, e, m, v;
node *l, *r;
node (ll S, ll E, ll V = 0) {
s = S, e = E, m = (S+E)>>1;
v = V;
l = r = nullptr;
}
node (ll S, ll E, node *L, node *R) {
s = S, e = E, m = (S+E)>>1;
v = 0;
l = L, r = R;
if (l != nullptr) v = l->v + r->v;
}
};
node* build(ll S, ll E) {
if (S != E) {
ll m = (S + E) >> 1;
return new node(S, E, build(S, m), build(m+1, E));
}
return new node(S, E);
}
node* upd(node *rt, ll X, ll V) {
if (rt->s == rt->e) return new node(rt->s, rt->e, rt->v + V);
if (X <= rt->m) return new node(rt->s, rt->e, upd(rt->l, X, V), rt->r);
return new node(rt->s, rt->e, rt->l, upd(rt->r, X, V));
}
ll qu(node *rt, ll S, ll E) {
if (rt->s == S && rt->e == E) return rt->v;
if (E <= rt->m) return qu(rt->l, S, E);
if (S > rt->m) return qu(rt->r, S, E);
return qu(rt->l, S, rt->m) + qu(rt->r, rt->m + 1, E);
}
vector<node*> rts;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n >> m >> q;
blk = min(blk, m);
memset(rep, -1, sizeof(rep));
cin >> a[0];
a[0]--;
p[a[0]].push_back(0);
iloop(1, n) {
cin >> t >> a[i];
t--, a[i]--;
p[a[i]].push_back(i);
adj[t].push_back(i);
}
iloop(0, m) cnt[i] = {p[i].size(), i};
sort(cnt, cnt + m, greater<pll>());
iloop(0, blk) {
rep[cnt[i].second] = i;
ur[i] = cnt[i].second;
dfs1(0, cnt[i].second, 0);
}
dfs2(0);
rts.push_back(build(0, n-1));
iloop(0, m) {
rng[i].first = rts.size() - 1;
for (auto it : p[i]) rts.push_back(upd(rts.back(), pre[it], 1));
rng[i].second = rts.size() - 1;
}
ll t1, t2;
while (q--) {
cin >> t1 >> t2;
t1--, t2--;
if (rep[t1] != -1) cout << res[rep[t1]][t2];
else {
ll cans = 0;
for (auto it : p[t1]) cans += qu(rts[rng[t2].second], pre[it], pos[it]) - qu(rts[rng[t2].first], pre[it], pos[it]);
cout << cans;
}
cout << endl;
}
}
