# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define int long long
#define pii pair <int, int>
using namespace std;
const int N = 3e5 + 5, B = 450;
int tin,in[N],out[N],anss,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];
map <int,int> ans[N];
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[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[r1][r2]<<"\n";
}
}
Compilation message
regions.cpp: In function 'void dfs(long long int, long long int)':
regions.cpp:22:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
22 | for (int i = 0; i < v[a].size(); i++) {
| ~~^~~~~~~~~~~~~
regions.cpp: In function 'void dfs1(long long int, long long int)':
regions.cpp:33:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
33 | for (int j = 0; j < heavy.size(); j++) {
| ~~^~~~~~~~~~~~~~
regions.cpp:37:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
37 | for (int i = 0; i < v[a].size(); i++) {
| ~~^~~~~~~~~~~~~
regions.cpp: At global scope:
regions.cpp:44:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
44 | main() {
| ^~~~
regions.cpp: In function 'int main()':
regions.cpp:55:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
55 | for (int j = 0; j < heavy.size(); j++) {
| ~~^~~~~~~~~~~~~~
regions.cpp:60:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
60 | for (int i = 0; i < vv.size(); i++) {
| ~~^~~~~~~~~~~
regions.cpp:69:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
69 | for (int i = 0; i < v1[r1].size(); i++) {
| ~~^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
19 ms |
42568 KB |
Output is correct |
| 2 |
Correct |
22 ms |
42696 KB |
Output is correct |
| 3 |
Correct |
22 ms |
42568 KB |
Output is correct |
| 4 |
Correct |
24 ms |
42596 KB |
Output is correct |
| 5 |
Correct |
26 ms |
42652 KB |
Output is correct |
| 6 |
Correct |
35 ms |
42720 KB |
Output is correct |
| 7 |
Correct |
48 ms |
42832 KB |
Output is correct |
| 8 |
Correct |
50 ms |
42952 KB |
Output is correct |
| 9 |
Correct |
65 ms |
43864 KB |
Output is correct |
| 10 |
Correct |
99 ms |
44100 KB |
Output is correct |
| 11 |
Correct |
146 ms |
44876 KB |
Output is correct |
| 12 |
Correct |
155 ms |
46024 KB |
Output is correct |
| 13 |
Correct |
242 ms |
46444 KB |
Output is correct |
| 14 |
Correct |
313 ms |
47292 KB |
Output is correct |
| 15 |
Correct |
429 ms |
52404 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2362 ms |
55648 KB |
Output is correct |
| 2 |
Correct |
2883 ms |
55456 KB |
Output is correct |
| 3 |
Correct |
3650 ms |
59512 KB |
Output is correct |
| 4 |
Correct |
317 ms |
47504 KB |
Output is correct |
| 5 |
Correct |
393 ms |
50680 KB |
Output is correct |
| 6 |
Correct |
1101 ms |
74496 KB |
Output is correct |
| 7 |
Correct |
2117 ms |
63052 KB |
Output is correct |
| 8 |
Correct |
2965 ms |
127204 KB |
Output is correct |
| 9 |
Correct |
3564 ms |
68004 KB |
Output is correct |
| 10 |
Runtime error |
1291 ms |
131076 KB |
Execution killed with signal 9 |
| 11 |
Correct |
7088 ms |
75208 KB |
Output is correct |
| 12 |
Correct |
2290 ms |
73872 KB |
Output is correct |
| 13 |
Correct |
3049 ms |
75756 KB |
Output is correct |
| 14 |
Correct |
3904 ms |
98340 KB |
Output is correct |
| 15 |
Correct |
4922 ms |
83276 KB |
Output is correct |
| 16 |
Correct |
5104 ms |
94376 KB |
Output is correct |
| 17 |
Correct |
5287 ms |
114144 KB |
Output is correct |
