#include<bits/stdc++.h>
#define int long long
#define sz(x) (int) x.size()
#define all(x) x.begin(), x.end()
using namespace std;
const int N = 2e5 + 5;
vector<int> E[N];
vector<int> can_st[N], can_ed[N];
int ans[25001][250001];
int val[N], st[N], ed[N];
int n, q, r, t = 0;
void dfs(int u, int p) {
st[u] = ++t;
can_st[val[u]].push_back(st[u]);
for(int v: E[u]) {
if(v==p) continue;
dfs(v, u);
}
ed[u] = ++t;
can_ed[val[u]].push_back(ed[u]);
}
int count_parent(int u, int c) {
// st[x] <= st[u]
// ed[x] <= st[u]
int a = upper_bound(all(can_st[c]), st[u]) - can_st[c].begin();
int b = upper_bound(all(can_ed[c]), st[u]) - can_ed[c].begin();
return a - b;
}
void solve() {
cin >> n >> r >> q;
for(int i=1; i<=n; i++) {
if(i != 1) {
int p; cin >> p;
E[p].push_back(i);
E[i].push_back(p);
}
cin >> val[i];
}
dfs(1, 0);
for(int i=1; i<=r; i++) sort(all(can_ed[i]));
for(int i=1; i<=n; i++) {
for(int color = 1; color <=r; color++) {
if(color == val[i]) continue;
ans[val[i]][color] += count_parent(i, color);
}
}
while(q--) {
int r1, r2; cin >> r1 >> r2;
cout<<ans[r2][r1] << endl;
}
}
/*
1
3
2
1
*/
signed main() {
if(fopen("input.txt", "r")) freopen("input.txt", "r", stdin);
ios_base::sync_with_stdio(false);cin.tie(0);
int T = 1;
// cin >> T;
while(T--) solve();
}
Compilation message (stderr)
regions.cpp: In function 'int main()':
regions.cpp:79:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
79 | if(fopen("input.txt", "r")) freopen("input.txt", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(ios_init.o): in function `std::ios_base::Init::Init()':
(.text._ZNSt8ios_base4InitC2Ev+0x1f): failed to convert GOTPCREL relocation against '_ZNSt8ios_base4Init11_S_refcountE'; relink with --no-relax
(.text._ZNSt8ios_base4InitC2Ev+0x5f): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0x66): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0x71): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0x7c): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0xa0): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0xab): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0xc8): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0xe1): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0xf4): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cin_sync' defined in .bss._ZN14__gnu_internal12buf_cin_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0xfb): relocation truncated to fit: R_X86_64_PC32 against symbol `__gnu_internal::buf_cout_sync' defined in .bss._ZN14__gnu_internal13buf_cout_syncE section in /usr/lib/gcc/x86_64-linux-gnu/13/libstdc++.a(globals_io.o)
(.text._ZNSt8ios_base4InitC2Ev+0x101): additional relocation overflows omitted from the output
(.text._ZNSt8ios_base4InitC2Ev+0x1ed): failed to convert GOTPCREL relocation against '_ZSt4cout'; relink with --no-relax
(.text._ZNSt8ios_base4InitC2Ev+0x252): failed to convert GOTPCREL relocation against '_ZSt3cin'; relink with --no-relax
(.text._ZNSt8ios_base4InitC2Ev+0x2bc): failed to convert GOTPCREL relocation against '_ZSt4cerr'; relink with --no-relax
(.text._ZNSt8ios_base4InitC2Ev+0x316): failed to convert GOTPCREL relocation against '_ZSt4clog'; relink with --no-relax
(.text._ZNSt8ios_base4InitC2Ev+0x50f): failed to convert GOTPCREL relocation against '_ZSt5wcout'; relink with --no-relax
(.text._ZNSt8ios_base4InitC2Ev+0x57d): failed to convert GOTPCREL relocation against '_ZSt4wcin'; relink with --no-relax
(.text._ZNSt8ios_base4InitC2Ev+0x5f0): failed to convert GOTPCREL relocation against '_ZSt5wcerr'; relink with --no-relax
(.text._ZNSt8ios_base4InitC2Ev+0x654): failed to convert GOTPCREL relocation against '_ZSt5wclog'; relink with --no-relax
/usr/bin/ld: final link failed
collect2: error: ld returned 1 exit status