#include <bits/stdc++.h>
using namespace std;
vector<int> adj[200001];
int arr[200001] , cnt[200001];
bool mark[200001];
pair<int,map<int,int>> dfs(int i,int pr){
map<int,int> mp;
pair<int,map<int,int>> p1;
int bad = 0;
mp[arr[i]]++;
if(cnt[arr[i]]!=1)bad++;
for(auto j:adj[i]){
if(j!=pr){
p1 = dfs(j,i);
bad+=p1.first;
if(p1.second.size()>mp.size())swap(mp,p1.second);
for(auto k:p1.second){
if(mp[k.first]!=0)bad--;
mp[k.first]+=k.second;
if(mp[k.second]==cnt[k.first]&&k.second!=cnt[k.first])bad--;
}
}
}
if(bad==0){
mark[i] = 1;
}
return {bad,mp};
}
int calc(int i,int pr){
int sum = 0;
for(auto j:adj[i]){
if(j==pr)continue;
sum+=calc(j,i);
}
if(mark[i]){
if(sum)return sum;
else return 1;
}else return sum;
}
signed main(){
ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
int n,k;
cin>>n>>k;
for(int i = 0;i<n-1;i++){
int a,b;
cin>>a>>b;
adj[a].push_back(b);
adj[b].push_back(a);
}
for(int i = 1;i<=n;i++){
cin>>arr[i];
cnt[arr[i]]++;
}
pair<int,map<int,int>> nothing = dfs(1,0);
cout<<calc(1,0)-1<<"\n";
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
52 ms |
8900 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |