#include <bits/stdc++.h>
#define MAXN 205000
#define REGIOES 25100
#define INI MAXN-5
#define SQRTN 450
int cores[MAXN],array[MAXN],primeiro[MAXN],size[MAXN],cur;
std::vector<int> con[MAXN];
std::vector<int> indices[REGIOES];
int N,R,Q;
int dfs(int pos,int prev){
array[cur]=cores[pos];
primeiro[pos]=cur;
++cur;
int res=1;
for(auto&x:con[pos]){
if(x==prev)continue;
res+=dfs(x,pos);
}
return size[pos]=res;
}
int tamanho[REGIOES];
bool grandes[REGIOES];
int indicegrandeza[REGIOES];
const int threshold = SQRTN;///Mudar para SQRTN!!!!!!
int curg=0;
namespace big {
int bucket[SQRTN][REGIOES];
int tab[MAXN*4];
void query(int l,int r,int la=0,int ra=INI,int pos=1){
if(ra<l||la>r)return;
if(la>=l&&ra<=r){
++tab[pos];
return;
}
int m=(la+ra)/2;
query(l,r,la,m,pos*2);
query(l,r,m+1,ra,(pos*2)+1);
}
void build(int k,int la=0,int ra=INI,int pos=1){
if(tab[pos]){
for(int i=la;i!=ra+1;++i){
bucket[k][array[i]]+=tab[pos];
}
tab[pos]=0;
}
if(la==ra)return;
int m=(la+ra)/2;
build(k,la,m,pos*2);
build(k,m+1,ra,(pos*2)+1);
}
void preparar(void){
for(int i=0;i!=REGIOES;++i){
if(grandes[i]){
for(auto&x:indices[i]){
query(primeiro[x],primeiro[x]+size[x]-1);
}
build(indicegrandeza[i]);
}
}
}
int consulta(int x,int y){
return bucket[indicegrandeza[x]][y];
}
}
typedef std::pair<int,int> pii;
namespace small {
std::vector<pii> tab[MAXN*4];
int query(int l,int r,int k,int la=0,int ra=INI,int pos=1){
if(ra<l||la>r)return 0;
if(la>=l&&ra<=r){
int l=0,r=tab[pos].size()-1;
while(l<r){
int m = (l+r)/2;
if(tab[pos][m].first>=k){
r=m;
}else l=m+1;
}
if(tab[pos][l].first==k)return tab[pos][l].second;return 0;
}
int m=(la+ra)/2;
return query(l,r,k,la,m,pos*2) +
query(l,r,k,m+1,ra,(pos*2)+1);
}
void build(int la=0,int ra=INI,int pos=1){
for(int i=la;i!=ra+1;++i){
tab[pos].push_back({array[i],1});
}
std::sort(tab[pos].begin(),tab[pos].end());
{
std::vector<pii> novo_vetor;
for(auto&x:tab[pos]){
if(!novo_vetor.size()||novo_vetor.back().first!=x.first){
novo_vetor.push_back(x);
}else ++novo_vetor.back().second;
}
tab[pos]=novo_vetor;
}
if(la==ra)return;
int m=(la+ra)/2;
build(la,m,pos*2);
build(m+1,ra,(pos*2)+1);
}
int consulta(int a,int b){
int res=0;
for(auto&x:indices[a]){
res+=query(primeiro[x],primeiro[x]+size[x]-1,b);
}
return res;
}
};
int main()
{
std::ios::sync_with_stdio(false);
std::cin>>N>>R>>Q;
std::cin>>cores[0];
indices[cores[0]].push_back(0);
for(int i=1;i!=N;++i){
int a,b;std::cin>>a>>b;--a;
cores[i]=b;
indices[b].push_back(i);
tamanho[b]++;
con[a].push_back(i);con[i].push_back(a);
}
dfs(0,0);
for(int i=0;i!=REGIOES;++i){
if(tamanho[i]>threshold){
indicegrandeza[i]=curg;
++curg;
grandes[i]=true;
}
}
big::preparar();
small::build();
for(int i=0;i!=Q;++i){
int a,b;
std::cin>>a>>b;
if(grandes[a]){
std::cout<<big::consulta(a,b)<<std::endl;
}else {
std::cout<<small::consulta(a,b)<<std::endl;
}
}
}
Compilation message
regions.cpp: In function 'int small::query(int, int, int, int, int, int)':
regions.cpp:78:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
78 | if(tab[pos][l].first==k)return tab[pos][l].second;return 0;
| ^~
regions.cpp:78:63: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
78 | if(tab[pos][l].first==k)return tab[pos][l].second;return 0;
| ^~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
219 ms |
68852 KB |
Output is correct |
| 2 |
Correct |
205 ms |
68788 KB |
Output is correct |
| 3 |
Correct |
219 ms |
68860 KB |
Output is correct |
| 4 |
Correct |
237 ms |
68904 KB |
Output is correct |
| 5 |
Correct |
216 ms |
68904 KB |
Output is correct |
| 6 |
Correct |
235 ms |
68996 KB |
Output is correct |
| 7 |
Correct |
331 ms |
68932 KB |
Output is correct |
| 8 |
Correct |
256 ms |
68912 KB |
Output is correct |
| 9 |
Correct |
310 ms |
69384 KB |
Output is correct |
| 10 |
Correct |
385 ms |
69412 KB |
Output is correct |
| 11 |
Correct |
578 ms |
69684 KB |
Output is correct |
| 12 |
Correct |
731 ms |
70244 KB |
Output is correct |
| 13 |
Correct |
708 ms |
70120 KB |
Output is correct |
| 14 |
Correct |
1278 ms |
70540 KB |
Output is correct |
| 15 |
Correct |
2726 ms |
73460 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
8013 ms |
74516 KB |
Time limit exceeded |
| 2 |
Execution timed out |
8061 ms |
74140 KB |
Time limit exceeded |
| 3 |
Execution timed out |
8018 ms |
76888 KB |
Time limit exceeded |
| 4 |
Correct |
1330 ms |
70800 KB |
Output is correct |
| 5 |
Correct |
1979 ms |
72404 KB |
Output is correct |
| 6 |
Correct |
1181 ms |
74564 KB |
Output is correct |
| 7 |
Execution timed out |
8018 ms |
74304 KB |
Time limit exceeded |
| 8 |
Correct |
5404 ms |
84012 KB |
Output is correct |
| 9 |
Execution timed out |
8060 ms |
78320 KB |
Time limit exceeded |
| 10 |
Execution timed out |
8019 ms |
90860 KB |
Time limit exceeded |
| 11 |
Execution timed out |
8064 ms |
80396 KB |
Time limit exceeded |
| 12 |
Execution timed out |
8032 ms |
81324 KB |
Time limit exceeded |
| 13 |
Execution timed out |
8058 ms |
82504 KB |
Time limit exceeded |
| 14 |
Execution timed out |
8044 ms |
84080 KB |
Time limit exceeded |
| 15 |
Execution timed out |
8022 ms |
86436 KB |
Time limit exceeded |
| 16 |
Execution timed out |
8022 ms |
93896 KB |
Time limit exceeded |
| 17 |
Execution timed out |
8084 ms |
94268 KB |
Time limit exceeded |
