#include <bits/stdc++.h>
using namespace std;
int N, K;
vector<int> adjList[100001];
int arr[100001];
int sum[100001];
int ans = 0;
void DFS(int node, int parent) {
for (auto child: adjList[node]) {
if (child != parent) {
DFS(child, node);
}
}
if ((int)adjList[node].size() == 1 && node != 1) {
sum[node] = arr[node];
}
else {
int cnt = arr[node];
priority_queue<int> pq;
for (auto child: adjList[node]) {
if (child != parent) {
pq.push(-sum[child]);
}
}
int cuts = 0;
while (!pq.empty()) {
int w = -pq.top();
cnt += w;
pq.pop();
if (cnt > K) {
cnt -= w;
cuts = (int)pq.size()+1;
break;
}
}
while (!pq.empty()) pq.pop();
sum[node] = cnt;
ans += cuts;
}
}
int main() {
cin >> N >> K;
for (int i = 1; i <= N; i++) {
cin >> arr[i];
}
for (int i = 0; i < N-1; i++) {
int u, v;
cin >> u >> v;
adjList[u].push_back(v);
adjList[v].push_back(u);
}
DFS(1, -1);
cout << ans << "\n";
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2660 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2552 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 14 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2656 KB |
Output is correct |
| 20 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2652 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
105 ms |
22548 KB |
Output is correct |
| 2 |
Correct |
102 ms |
22592 KB |
Output is correct |
| 3 |
Correct |
102 ms |
22604 KB |
Output is correct |
| 4 |
Correct |
101 ms |
22596 KB |
Output is correct |
| 5 |
Correct |
104 ms |
22532 KB |
Output is correct |
| 6 |
Correct |
103 ms |
22492 KB |
Output is correct |
| 7 |
Correct |
101 ms |
22480 KB |
Output is correct |
| 8 |
Correct |
83 ms |
22040 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2660 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2552 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 14 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2656 KB |
Output is correct |
| 20 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 22 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 23 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 24 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 25 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 26 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 28 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 29 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 30 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 31 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 32 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 33 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 34 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 35 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 36 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 37 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 38 |
Correct |
3 ms |
2644 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2660 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2552 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 14 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2656 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2656 KB |
Output is correct |
| 20 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 22 |
Correct |
105 ms |
22548 KB |
Output is correct |
| 23 |
Correct |
102 ms |
22592 KB |
Output is correct |
| 24 |
Correct |
102 ms |
22604 KB |
Output is correct |
| 25 |
Correct |
101 ms |
22596 KB |
Output is correct |
| 26 |
Correct |
104 ms |
22532 KB |
Output is correct |
| 27 |
Correct |
103 ms |
22492 KB |
Output is correct |
| 28 |
Correct |
101 ms |
22480 KB |
Output is correct |
| 29 |
Correct |
83 ms |
22040 KB |
Output is correct |
| 30 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 31 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 32 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 33 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 34 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 35 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 36 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 37 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 38 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 39 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 40 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 41 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 42 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 43 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 44 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 45 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 46 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 47 |
Correct |
101 ms |
13244 KB |
Output is correct |
| 48 |
Correct |
96 ms |
11032 KB |
Output is correct |
| 49 |
Correct |
101 ms |
10316 KB |
Output is correct |
| 50 |
Correct |
103 ms |
9832 KB |
Output is correct |
| 51 |
Correct |
122 ms |
8600 KB |
Output is correct |
| 52 |
Correct |
105 ms |
8728 KB |
Output is correct |
| 53 |
Correct |
101 ms |
8484 KB |
Output is correct |
| 54 |
Correct |
131 ms |
8472 KB |
Output is correct |
| 55 |
Correct |
93 ms |
8060 KB |
Output is correct |
| 56 |
Correct |
91 ms |
8012 KB |
Output is correct |
| 57 |
Correct |
85 ms |
9264 KB |
Output is correct |
