#include<bits/stdc++.h>
#pragma GCC optimize(2)
#define l int
int read(){
char x = getchar();
int val = 0;
while(x<'0'||x>'9')x=getchar();
while('0'<=x&&x<='9')
val = val*10+x-'0', x=getchar();
return val;
}
void print(int num){
if(num<0){
putchar('-');
num*=-1;
}
if(num>9) {
print(num/10);
}
putchar((num%10)^48);
}
using namespace std;
vector<l> adj[200001];
vector<pair<l,l>> arr[25001];
l region[200001], t, ans1[21][25001], ans2[25001][21], in[200001], out[200001], li[200001], sz[25001], lg[21];
void merge(unordered_map<l, l> &a, unordered_map<l, l> &b){
if(a.size()<b.size())
swap(a, b);
for(auto i: b)
a[i.first]+=i.second;
b.clear();
}
unordered_map<l,l>& dfs(l n){
unordered_map<l,l> cur;
cur[region[n]]=1;
in[n]=t++;
arr[region[n]].push_back({in[n],1});
for(auto i: adj[n]){
merge(cur, dfs(i));
}
out[n]=t++;
arr[region[n]].push_back({out[n],0});
if(li[region[n]])
for(auto i: cur)
ans1[li[region[n]]][i.first]+=i.second;
else
for(auto i: lg)
ans2[region[n]][li[i]]+=cur[i];
return cur;
}
l query_s(int r1, int r2){
l sum=0, o=0, a=0, b=0;
vector<int> v;
while(a<arr[r1].size()||b<arr[r2].size()){
if(a<arr[r1].size()&&b<arr[r2].size()){
if(arr[r1][a]<arr[r2][b])
v.push_back(arr[r1][a].second*2-1), a++;
else
v.push_back(0), b++;
} else if(a<arr[r1].size())
v.push_back(arr[r1][a].second*2-1), a++;
else
v.push_back(0), b++;
}
for(auto i: v)
if(i)
o+=i;
else
sum+=o;
return sum/2;
}
int main(){
l n=read(), r=read(), q=read(), lr=0;
region[1]=read();
for(l i = 2; i <= n; i++){
adj[read()].push_back(i);
region[i] = read();
sz[region[i]]++;
}
for(int i = 1; i <= r; i++)
if(sz[i]>10000)
lg[lr]=i, li[i]=++lr;
dfs(1);
while(q--){
int r1=read(), r2=read();
if(li[r1])
print(ans1[li[r1]][r2]),cout<<endl;
else if(li[r2])
print(ans2[r1][li[r2]]),cout<<endl;
else
print(query_s(r1, r2)),cout<<endl;
}
return 0;
}
Compilation message
regions.cpp: In function 'std::unordered_map<int, int>& dfs(int)':
regions.cpp:49:12: warning: reference to local variable 'cur' returned [-Wreturn-local-addr]
49 | return cur;
| ^~~
regions.cpp:34:24: note: declared here
34 | unordered_map<l,l> cur;
| ^~~
regions.cpp: In function 'int query_s(int, int)':
regions.cpp:54:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | while(a<arr[r1].size()||b<arr[r2].size()){
| ~^~~~~~~~~~~~~~~
regions.cpp:54:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | while(a<arr[r1].size()||b<arr[r2].size()){
| ~^~~~~~~~~~~~~~~
regions.cpp:55:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
55 | if(a<arr[r1].size()&&b<arr[r2].size()){
| ~^~~~~~~~~~~~~~~
regions.cpp:55:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
55 | if(a<arr[r1].size()&&b<arr[r2].size()){
| ~^~~~~~~~~~~~~~~
regions.cpp:60:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
60 | } else if(a<arr[r1].size())
| ~^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
10 ms |
21592 KB |
Execution killed with signal 11 |
| 2 |
Runtime error |
10 ms |
21592 KB |
Execution killed with signal 11 |
| 3 |
Runtime error |
10 ms |
21644 KB |
Execution killed with signal 11 |
| 4 |
Runtime error |
9 ms |
21592 KB |
Execution killed with signal 11 |
| 5 |
Runtime error |
10 ms |
21592 KB |
Execution killed with signal 11 |
| 6 |
Runtime error |
10 ms |
22148 KB |
Execution killed with signal 11 |
| 7 |
Runtime error |
10 ms |
21592 KB |
Execution killed with signal 11 |
| 8 |
Runtime error |
11 ms |
21592 KB |
Execution killed with signal 11 |
| 9 |
Runtime error |
12 ms |
24920 KB |
Execution killed with signal 11 |
| 10 |
Runtime error |
10 ms |
22104 KB |
Execution killed with signal 11 |
| 11 |
Runtime error |
11 ms |
22616 KB |
Execution killed with signal 11 |
| 12 |
Runtime error |
11 ms |
23028 KB |
Execution killed with signal 11 |
| 13 |
Runtime error |
12 ms |
22360 KB |
Execution killed with signal 11 |
| 14 |
Runtime error |
13 ms |
23516 KB |
Execution killed with signal 11 |
| 15 |
Runtime error |
31 ms |
49292 KB |
Execution killed with signal 11 |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
16 ms |
27040 KB |
Execution killed with signal 11 |
| 2 |
Runtime error |
21 ms |
24580 KB |
Execution killed with signal 11 |
| 3 |
Runtime error |
31 ms |
36016 KB |
Execution killed with signal 11 |
| 4 |
Runtime error |
12 ms |
23272 KB |
Execution killed with signal 11 |
| 5 |
Runtime error |
15 ms |
24312 KB |
Execution killed with signal 11 |
| 6 |
Runtime error |
14 ms |
24552 KB |
Execution killed with signal 11 |
| 7 |
Runtime error |
17 ms |
25300 KB |
Execution killed with signal 11 |
| 8 |
Runtime error |
23 ms |
33272 KB |
Execution killed with signal 11 |
| 9 |
Runtime error |
25 ms |
30844 KB |
Execution killed with signal 11 |
| 10 |
Runtime error |
32 ms |
33880 KB |
Execution killed with signal 11 |
| 11 |
Runtime error |
36 ms |
29328 KB |
Execution killed with signal 11 |
| 12 |
Runtime error |
30 ms |
33824 KB |
Execution killed with signal 11 |
| 13 |
Runtime error |
32 ms |
33184 KB |
Execution killed with signal 11 |
| 14 |
Runtime error |
35 ms |
32652 KB |
Execution killed with signal 11 |
| 15 |
Runtime error |
38 ms |
45320 KB |
Execution killed with signal 11 |
| 16 |
Runtime error |
2380 ms |
131072 KB |
Execution killed with signal 9 |
| 17 |
Runtime error |
32 ms |
34912 KB |
Execution killed with signal 11 |
