#include <bits/stdc++.h>
using namespace std;
int n,v;
int p[100010];
vector<int> adj[100010];
long long dp(int x,int dist,int pa){
// cout << x << " " << dist << " " << pa << '\n';
long long ans = 0;
long long sum = 0;
for (int i = 0; i < (int)(adj[x].size()); i++){
int nx = adj[x][i];
if (nx == pa) continue;
sum += p[nx];
}
// cout << sum << "\n";
if (dist == 0) return sum;
for (int i = 0; i < (int)(adj[x].size()); i++){
int nx = adj[x][i];
if (nx == pa) continue;
ans = max(ans,dp(nx,dist-1,x)+sum-p[nx]);
}
return ans;
}
int main(){
cin >> n >> v;
for (int i = 0; i < n; i++){
cin >> p[i];
}
for (int i = 0; i < n-1; i++){
int a,b;
cin >> a >> b;
a--;
b--;
adj[a].push_back(b);
adj[b].push_back(a);
}
if (n <= 1000){
long long ans = 0;
for (int i = 0; i < n; i++){
// cout << dp(i,v,-1) << "\n";
ans = max(ans,dp(i,v,-1));
}
cout << ans;
}
else cout << dp(0,v,-1);
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
4 ms |
2688 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
4 ms |
2688 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
170 ms |
6268 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
4 ms |
2688 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |