# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define pii pair <int, int>
using namespace std;
const int N = 2e5 + 5, B = 500;
int tin,in[N],out[N],r1,r2,fer,n,le,ri,up,hea[N],lig[N],col[N],r,q,p[N],idx[N];
multiset <pii> :: iterator it;
int mpp[N],shes[N];
long long ans[550][30000],anss;
vector <int> heavy,light;
vector <int> v[N],v1[N];
multiset <pii> ms[N];
vector <pii> vv;
multiset <int> mss;
void dfs(int a, int p) {
tin++;
in[a] = tin;
vv.pb({in[a],a});
for (int i = 0; i < v[a].size(); i++) {
int to = v[a][i];
if (to == p) continue;
dfs(to,a);
}
out[a] = tin;
}
void dfs1(int a, int p) {
if (hea[col[a]]) {
mpp[col[a]]++;
}
for (int j = 0; j < heavy.size(); j++) {
fer = heavy[j];
if (mpp[fer]) ans[shes[fer]][col[a]]+= mpp[fer];
}
for (int i = 0; i < v[a].size(); i++) {
int to = v[a][i];
if (to == p) continue;
dfs1(to,a);
}
if (hea[col[a]]) mpp[col[a]]--;
}
main() {
cin>>n>>r>>q;
for (int i = 1; i <= n; i++) {
if (i != 1) cin>>p[i],v[p[i]].pb(i),v[i].pb(p[i]);
cin>>col[i];
v1[col[i]].pb(i);
}
for (int i = 1; i <= r; i++) {
if (v1[i].size() >= B) heavy.pb(i), hea[i] = 1;
else light.pb(i),lig[i] = 1;
}
for (int j = 0; j < heavy.size(); j++) {
shes[heavy[j]] = j;
}
dfs(1,0);
sort(vv.begin(),vv.end());
for (int i = 0; i < vv.size(); i++) {
idx[col[vv[i].s]]++;
ms[col[vv[i].s]].insert({vv[i].f,idx[col[vv[i].s]]});
}
dfs1(1,0);
while(q--) {
cin>>r1>>r2;
if (lig[r1]) {
int anss = 0;
for (int i = 0; i < v1[r1].size(); i++) {
up = v1[r1][i];
it = ms[r2].lower_bound({in[up],0});
if (it == ms[r2].end()) continue;
le = (*it).s;
it = ms[r2].upper_bound({out[up],1e9});
if (it == ms[r2].end()) ri = ms[r2].size();
else ri = (*it).s - 1;
anss += (ri - le + 1);
}
cout<<anss<<"\n";
continue;
}
cout<<ans[shes[r1]][r2]<<"\n";
}
}
Compilation message
regions.cpp: In function 'void dfs(int, int)':
regions.cpp:21:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | for (int i = 0; i < v[a].size(); i++) {
| ~~^~~~~~~~~~~~~
regions.cpp: In function 'void dfs1(int, int)':
regions.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
32 | for (int j = 0; j < heavy.size(); j++) {
| ~~^~~~~~~~~~~~~~
regions.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
36 | for (int i = 0; i < v[a].size(); i++) {
| ~~^~~~~~~~~~~~~
regions.cpp: At global scope:
regions.cpp:43:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
43 | main() {
| ^~~~
regions.cpp: In function 'int main()':
regions.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | for (int j = 0; j < heavy.size(); j++) {
| ~~^~~~~~~~~~~~~~
regions.cpp:59:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
59 | for (int i = 0; i < vv.size(); i++) {
| ~~^~~~~~~~~~~
regions.cpp:68:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
68 | for (int i = 0; i < v1[r1].size(); i++) {
| ~~^~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
11 ms |
19016 KB |
Output is correct |
2 |
Correct |
11 ms |
19092 KB |
Output is correct |
3 |
Correct |
12 ms |
19016 KB |
Output is correct |
4 |
Correct |
15 ms |
19016 KB |
Output is correct |
5 |
Correct |
13 ms |
19144 KB |
Output is correct |
6 |
Correct |
29 ms |
19212 KB |
Output is correct |
7 |
Correct |
38 ms |
19272 KB |
Output is correct |
8 |
Correct |
45 ms |
19248 KB |
Output is correct |
9 |
Correct |
59 ms |
20044 KB |
Output is correct |
10 |
Correct |
95 ms |
20132 KB |
Output is correct |
11 |
Correct |
136 ms |
20808 KB |
Output is correct |
12 |
Correct |
193 ms |
21624 KB |
Output is correct |
13 |
Correct |
206 ms |
21692 KB |
Output is correct |
14 |
Correct |
367 ms |
22376 KB |
Output is correct |
15 |
Correct |
404 ms |
26528 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2422 ms |
28388 KB |
Output is correct |
2 |
Correct |
2550 ms |
28060 KB |
Output is correct |
3 |
Correct |
3631 ms |
31532 KB |
Output is correct |
4 |
Correct |
325 ms |
22596 KB |
Output is correct |
5 |
Correct |
470 ms |
25180 KB |
Output is correct |
6 |
Correct |
1502 ms |
26444 KB |
Output is correct |
7 |
Correct |
1886 ms |
27204 KB |
Output is correct |
8 |
Correct |
1611 ms |
35636 KB |
Output is correct |
9 |
Correct |
2996 ms |
37296 KB |
Output is correct |
10 |
Correct |
5771 ms |
45008 KB |
Output is correct |
11 |
Correct |
6419 ms |
41780 KB |
Output is correct |
12 |
Correct |
1801 ms |
40364 KB |
Output is correct |
13 |
Correct |
2877 ms |
41548 KB |
Output is correct |
14 |
Correct |
3019 ms |
45416 KB |
Output is correct |
15 |
Correct |
4757 ms |
47256 KB |
Output is correct |
16 |
Correct |
4540 ms |
56388 KB |
Output is correct |
17 |
Correct |
4115 ms |
57892 KB |
Output is correct |