// In the name of God
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define mp make_pair
typedef long long ll;
const int N = 2e5 + 5;
int n, k, h[N];
int ans, dp[N];
vector<int> adj[N];
void dfs(int v, int p) {
dp[v] = h[v];
vector<int> vec;
for (auto u : adj[v]) {
if (u != p) {
dfs(u, v);
vec.pb(dp[u]);
}
}
sort(vec.begin(), vec.end());
ans += (int)vec.size();
for (int i = 0; i < (int)vec.size() && vec[i] + dp[v] <= k; dp[v] += vec[i], i++, ans--);
}
void solve() {
cin >> n >> k;
for (int i = 1; i <= n; i++)
cin >> h[i];
for (int i = 0; i < n - 1; i++) {
int v, u; cin >> v >> u;
adj[v].pb(u), adj[u].pb(v);
}
dfs(1, 0);
cout << ans << endl;
}
int32_t main() {
ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
int tc = 1; // cin >> tc;
while (tc--) {
solve();
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4956 KB |
Output is correct |
2 |
Correct |
2 ms |
4956 KB |
Output is correct |
3 |
Correct |
2 ms |
4956 KB |
Output is correct |
4 |
Correct |
2 ms |
4956 KB |
Output is correct |
5 |
Correct |
2 ms |
4956 KB |
Output is correct |
6 |
Correct |
2 ms |
4956 KB |
Output is correct |
7 |
Correct |
2 ms |
4956 KB |
Output is correct |
8 |
Correct |
2 ms |
5208 KB |
Output is correct |
9 |
Correct |
2 ms |
4956 KB |
Output is correct |
10 |
Correct |
2 ms |
4956 KB |
Output is correct |
11 |
Correct |
2 ms |
4956 KB |
Output is correct |
12 |
Correct |
1 ms |
4956 KB |
Output is correct |
13 |
Correct |
1 ms |
5168 KB |
Output is correct |
14 |
Correct |
2 ms |
4956 KB |
Output is correct |
15 |
Correct |
2 ms |
4956 KB |
Output is correct |
16 |
Correct |
2 ms |
5164 KB |
Output is correct |
17 |
Correct |
2 ms |
4956 KB |
Output is correct |
18 |
Correct |
2 ms |
4956 KB |
Output is correct |
19 |
Correct |
2 ms |
4960 KB |
Output is correct |
20 |
Correct |
2 ms |
4956 KB |
Output is correct |
21 |
Correct |
2 ms |
4956 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
37 ms |
21876 KB |
Output is correct |
2 |
Correct |
37 ms |
21840 KB |
Output is correct |
3 |
Correct |
38 ms |
21844 KB |
Output is correct |
4 |
Correct |
38 ms |
21852 KB |
Output is correct |
5 |
Correct |
37 ms |
21844 KB |
Output is correct |
6 |
Correct |
36 ms |
21720 KB |
Output is correct |
7 |
Correct |
35 ms |
22044 KB |
Output is correct |
8 |
Correct |
33 ms |
21332 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4956 KB |
Output is correct |
2 |
Correct |
2 ms |
4956 KB |
Output is correct |
3 |
Correct |
2 ms |
4956 KB |
Output is correct |
4 |
Correct |
2 ms |
4956 KB |
Output is correct |
5 |
Correct |
2 ms |
4956 KB |
Output is correct |
6 |
Correct |
2 ms |
4956 KB |
Output is correct |
7 |
Correct |
2 ms |
4956 KB |
Output is correct |
8 |
Correct |
2 ms |
5208 KB |
Output is correct |
9 |
Correct |
2 ms |
4956 KB |
Output is correct |
10 |
Correct |
2 ms |
4956 KB |
Output is correct |
11 |
Correct |
2 ms |
4956 KB |
Output is correct |
12 |
Correct |
1 ms |
4956 KB |
Output is correct |
13 |
Correct |
1 ms |
5168 KB |
Output is correct |
14 |
Correct |
2 ms |
4956 KB |
Output is correct |
15 |
Correct |
2 ms |
4956 KB |
Output is correct |
16 |
Correct |
2 ms |
5164 KB |
Output is correct |
17 |
Correct |
2 ms |
4956 KB |
Output is correct |
18 |
Correct |
2 ms |
4956 KB |
Output is correct |
19 |
Correct |
2 ms |
4960 KB |
Output is correct |
20 |
Correct |
2 ms |
4956 KB |
Output is correct |
21 |
Correct |
2 ms |
4956 KB |
Output is correct |
22 |
Correct |
2 ms |
5212 KB |
Output is correct |
23 |
Correct |
2 ms |
5212 KB |
Output is correct |
24 |
Correct |
2 ms |
5212 KB |
Output is correct |
25 |
Correct |
2 ms |
5212 KB |
Output is correct |
26 |
Correct |
2 ms |
5228 KB |
Output is correct |
27 |
Correct |
2 ms |
5212 KB |
Output is correct |
28 |
Correct |
2 ms |
5172 KB |
Output is correct |
29 |
Correct |
2 ms |
5212 KB |
Output is correct |
30 |
Correct |
2 ms |
5212 KB |
Output is correct |
31 |
Correct |
4 ms |
5212 KB |
Output is correct |
32 |
Correct |
2 ms |
5212 KB |
Output is correct |
33 |
Correct |
2 ms |
5212 KB |
Output is correct |
34 |
Correct |
2 ms |
5212 KB |
Output is correct |
35 |
Correct |
2 ms |
5212 KB |
Output is correct |
36 |
Correct |
2 ms |
5212 KB |
Output is correct |
37 |
Correct |
2 ms |
5172 KB |
Output is correct |
38 |
Correct |
2 ms |
5212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4956 KB |
Output is correct |
2 |
Correct |
2 ms |
4956 KB |
Output is correct |
3 |
Correct |
2 ms |
4956 KB |
Output is correct |
4 |
Correct |
2 ms |
4956 KB |
Output is correct |
5 |
Correct |
2 ms |
4956 KB |
Output is correct |
6 |
Correct |
2 ms |
4956 KB |
Output is correct |
7 |
Correct |
2 ms |
4956 KB |
Output is correct |
8 |
Correct |
2 ms |
5208 KB |
Output is correct |
9 |
Correct |
2 ms |
4956 KB |
Output is correct |
10 |
Correct |
2 ms |
4956 KB |
Output is correct |
11 |
Correct |
2 ms |
4956 KB |
Output is correct |
12 |
Correct |
1 ms |
4956 KB |
Output is correct |
13 |
Correct |
1 ms |
5168 KB |
Output is correct |
14 |
Correct |
2 ms |
4956 KB |
Output is correct |
15 |
Correct |
2 ms |
4956 KB |
Output is correct |
16 |
Correct |
2 ms |
5164 KB |
Output is correct |
17 |
Correct |
2 ms |
4956 KB |
Output is correct |
18 |
Correct |
2 ms |
4956 KB |
Output is correct |
19 |
Correct |
2 ms |
4960 KB |
Output is correct |
20 |
Correct |
2 ms |
4956 KB |
Output is correct |
21 |
Correct |
2 ms |
4956 KB |
Output is correct |
22 |
Correct |
37 ms |
21876 KB |
Output is correct |
23 |
Correct |
37 ms |
21840 KB |
Output is correct |
24 |
Correct |
38 ms |
21844 KB |
Output is correct |
25 |
Correct |
38 ms |
21852 KB |
Output is correct |
26 |
Correct |
37 ms |
21844 KB |
Output is correct |
27 |
Correct |
36 ms |
21720 KB |
Output is correct |
28 |
Correct |
35 ms |
22044 KB |
Output is correct |
29 |
Correct |
33 ms |
21332 KB |
Output is correct |
30 |
Correct |
2 ms |
5212 KB |
Output is correct |
31 |
Correct |
2 ms |
5212 KB |
Output is correct |
32 |
Correct |
2 ms |
5212 KB |
Output is correct |
33 |
Correct |
2 ms |
5212 KB |
Output is correct |
34 |
Correct |
2 ms |
5228 KB |
Output is correct |
35 |
Correct |
2 ms |
5212 KB |
Output is correct |
36 |
Correct |
2 ms |
5172 KB |
Output is correct |
37 |
Correct |
2 ms |
5212 KB |
Output is correct |
38 |
Correct |
2 ms |
5212 KB |
Output is correct |
39 |
Correct |
4 ms |
5212 KB |
Output is correct |
40 |
Correct |
2 ms |
5212 KB |
Output is correct |
41 |
Correct |
2 ms |
5212 KB |
Output is correct |
42 |
Correct |
2 ms |
5212 KB |
Output is correct |
43 |
Correct |
2 ms |
5212 KB |
Output is correct |
44 |
Correct |
2 ms |
5212 KB |
Output is correct |
45 |
Correct |
2 ms |
5172 KB |
Output is correct |
46 |
Correct |
2 ms |
5212 KB |
Output is correct |
47 |
Correct |
33 ms |
14932 KB |
Output is correct |
48 |
Correct |
33 ms |
13348 KB |
Output is correct |
49 |
Correct |
33 ms |
12392 KB |
Output is correct |
50 |
Correct |
34 ms |
12116 KB |
Output is correct |
51 |
Correct |
35 ms |
11096 KB |
Output is correct |
52 |
Correct |
34 ms |
11092 KB |
Output is correct |
53 |
Correct |
32 ms |
10980 KB |
Output is correct |
54 |
Correct |
32 ms |
10836 KB |
Output is correct |
55 |
Correct |
30 ms |
10588 KB |
Output is correct |
56 |
Correct |
30 ms |
10840 KB |
Output is correct |
57 |
Correct |
24 ms |
11724 KB |
Output is correct |