#include <bits/stdc++.h>
using namespace std;
#define fast ios::sync_with_stdio(0);cin.tie(0);
#define s second
#define f first
typedef long long ll;
const ll MOD = 1e9 + 7;
const ll LOGN = 20;
const ll MAXN = 1e5 + 100;
vector<vector<int>> graph;
ll h[MAXN];
int k, ans = 0;
int dfs(int node, int parent) {
vector<int> v;
for (auto u : graph[node]) {
if (u == parent)
continue;
v.push_back(dfs(u, node));
if (v.back() == 0)
v.pop_back();
}
int rem = k - h[node];
sort(v.begin(), v.end(), greater<int>());
while (v.size()) {
if (v.back() <= rem) {
rem -= v.back();
v.pop_back();
} else
break;
}
ans += v.size();
return (k - rem);
}
int main() {
fast
int n, a, b;
cin >> n >> k;
graph = vector<vector<int>>(n+1, vector<int>());
for (int i = 1; i <= n; i++)
cin >> h[i];
for (int i = 1; i < n; i++) {
cin >> a >> b;
graph[a].push_back(b);
graph[b].push_back(a);
}
dfs(1, 1);
cout << ans << "\n";
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
468 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
464 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
472 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
348 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
47 ms |
19576 KB |
Output is correct |
| 2 |
Correct |
40 ms |
19628 KB |
Output is correct |
| 3 |
Correct |
37 ms |
19540 KB |
Output is correct |
| 4 |
Correct |
36 ms |
19540 KB |
Output is correct |
| 5 |
Correct |
37 ms |
19360 KB |
Output is correct |
| 6 |
Correct |
35 ms |
19536 KB |
Output is correct |
| 7 |
Correct |
37 ms |
19540 KB |
Output is correct |
| 8 |
Correct |
37 ms |
19028 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
468 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
464 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
472 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
348 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
348 KB |
Output is correct |
| 25 |
Correct |
1 ms |
348 KB |
Output is correct |
| 26 |
Correct |
1 ms |
348 KB |
Output is correct |
| 27 |
Correct |
1 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
344 KB |
Output is correct |
| 29 |
Correct |
1 ms |
348 KB |
Output is correct |
| 30 |
Correct |
1 ms |
444 KB |
Output is correct |
| 31 |
Correct |
1 ms |
348 KB |
Output is correct |
| 32 |
Correct |
1 ms |
348 KB |
Output is correct |
| 33 |
Correct |
1 ms |
348 KB |
Output is correct |
| 34 |
Correct |
1 ms |
348 KB |
Output is correct |
| 35 |
Correct |
1 ms |
348 KB |
Output is correct |
| 36 |
Correct |
1 ms |
348 KB |
Output is correct |
| 37 |
Correct |
1 ms |
348 KB |
Output is correct |
| 38 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
468 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
464 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
472 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
348 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| 22 |
Correct |
47 ms |
19576 KB |
Output is correct |
| 23 |
Correct |
40 ms |
19628 KB |
Output is correct |
| 24 |
Correct |
37 ms |
19540 KB |
Output is correct |
| 25 |
Correct |
36 ms |
19540 KB |
Output is correct |
| 26 |
Correct |
37 ms |
19360 KB |
Output is correct |
| 27 |
Correct |
35 ms |
19536 KB |
Output is correct |
| 28 |
Correct |
37 ms |
19540 KB |
Output is correct |
| 29 |
Correct |
37 ms |
19028 KB |
Output is correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| 31 |
Correct |
1 ms |
348 KB |
Output is correct |
| 32 |
Correct |
1 ms |
348 KB |
Output is correct |
| 33 |
Correct |
1 ms |
348 KB |
Output is correct |
| 34 |
Correct |
1 ms |
348 KB |
Output is correct |
| 35 |
Correct |
1 ms |
348 KB |
Output is correct |
| 36 |
Correct |
1 ms |
344 KB |
Output is correct |
| 37 |
Correct |
1 ms |
348 KB |
Output is correct |
| 38 |
Correct |
1 ms |
444 KB |
Output is correct |
| 39 |
Correct |
1 ms |
348 KB |
Output is correct |
| 40 |
Correct |
1 ms |
348 KB |
Output is correct |
| 41 |
Correct |
1 ms |
348 KB |
Output is correct |
| 42 |
Correct |
1 ms |
348 KB |
Output is correct |
| 43 |
Correct |
1 ms |
348 KB |
Output is correct |
| 44 |
Correct |
1 ms |
348 KB |
Output is correct |
| 45 |
Correct |
1 ms |
348 KB |
Output is correct |
| 46 |
Correct |
1 ms |
348 KB |
Output is correct |
| 47 |
Correct |
34 ms |
12628 KB |
Output is correct |
| 48 |
Correct |
35 ms |
10836 KB |
Output is correct |
| 49 |
Correct |
32 ms |
10064 KB |
Output is correct |
| 50 |
Correct |
33 ms |
9820 KB |
Output is correct |
| 51 |
Correct |
42 ms |
8788 KB |
Output is correct |
| 52 |
Correct |
35 ms |
8784 KB |
Output is correct |
| 53 |
Correct |
34 ms |
8564 KB |
Output is correct |
| 54 |
Correct |
34 ms |
8540 KB |
Output is correct |
| 55 |
Correct |
34 ms |
8024 KB |
Output is correct |
| 56 |
Correct |
32 ms |
8028 KB |
Output is correct |
| 57 |
Correct |
28 ms |
9676 KB |
Output is correct |
