#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;
const int N = 100'010;
vector<int> A[N];
ll h[N];
int n; ll k;
pll dfs(int v, int p)
{
int ans = 1;
vector<ll> vec;
for (int u : A[v]) {
if (u != p) {
auto [x, y] = dfs(u, v);
ans += x;
vec.push_back(y);
}
}
sort(vec.begin(), vec.end());
ll sum = h[v];
for (auto x : vec) {
if (sum + x > k)
break;
sum += x;
ans -= 1;
}
return {ans, sum};
}
int main()
{
cin.tie(0) -> sync_with_stdio(false);
cin >> n >> k;
Loop (i,0,n)
cin >> h[i];
Loop (i,1,n) {
int v, u;
cin >> v >> u;
--v; --u;
A[v].push_back(u);
A[u].push_back(v);
}
cout << dfs(0, -1).first - 1 << '\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 |
2644 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2684 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2680 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2680 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 13 |
Correct |
2 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 |
1 ms |
2644 KB |
Output is correct |
| 17 |
Correct |
2 ms |
2684 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 19 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2644 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
41 ms |
20984 KB |
Output is correct |
| 2 |
Correct |
43 ms |
21044 KB |
Output is correct |
| 3 |
Correct |
44 ms |
21076 KB |
Output is correct |
| 4 |
Correct |
43 ms |
21040 KB |
Output is correct |
| 5 |
Correct |
42 ms |
20920 KB |
Output is correct |
| 6 |
Correct |
44 ms |
20944 KB |
Output is correct |
| 7 |
Correct |
42 ms |
20996 KB |
Output is correct |
| 8 |
Correct |
39 ms |
20584 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 |
2644 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2684 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2680 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2680 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 13 |
Correct |
2 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 |
1 ms |
2644 KB |
Output is correct |
| 17 |
Correct |
2 ms |
2684 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 19 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 22 |
Correct |
2 ms |
2772 KB |
Output is correct |
| 23 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 24 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 25 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 26 |
Correct |
2 ms |
2692 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2700 KB |
Output is correct |
| 28 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 29 |
Correct |
2 ms |
2772 KB |
Output is correct |
| 30 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 31 |
Correct |
3 ms |
2728 KB |
Output is correct |
| 32 |
Correct |
2 ms |
2692 KB |
Output is correct |
| 33 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 34 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 35 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 36 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 37 |
Correct |
3 ms |
2688 KB |
Output is correct |
| 38 |
Correct |
3 ms |
2696 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 |
2644 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2684 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2680 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2680 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 13 |
Correct |
2 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 |
1 ms |
2644 KB |
Output is correct |
| 17 |
Correct |
2 ms |
2684 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 19 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 22 |
Correct |
41 ms |
20984 KB |
Output is correct |
| 23 |
Correct |
43 ms |
21044 KB |
Output is correct |
| 24 |
Correct |
44 ms |
21076 KB |
Output is correct |
| 25 |
Correct |
43 ms |
21040 KB |
Output is correct |
| 26 |
Correct |
42 ms |
20920 KB |
Output is correct |
| 27 |
Correct |
44 ms |
20944 KB |
Output is correct |
| 28 |
Correct |
42 ms |
20996 KB |
Output is correct |
| 29 |
Correct |
39 ms |
20584 KB |
Output is correct |
| 30 |
Correct |
2 ms |
2772 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 |
2692 KB |
Output is correct |
| 35 |
Correct |
2 ms |
2700 KB |
Output is correct |
| 36 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 37 |
Correct |
2 ms |
2772 KB |
Output is correct |
| 38 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 39 |
Correct |
3 ms |
2728 KB |
Output is correct |
| 40 |
Correct |
2 ms |
2692 KB |
Output is correct |
| 41 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 42 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 43 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 44 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 45 |
Correct |
3 ms |
2688 KB |
Output is correct |
| 46 |
Correct |
3 ms |
2696 KB |
Output is correct |
| 47 |
Correct |
42 ms |
12996 KB |
Output is correct |
| 48 |
Correct |
47 ms |
11004 KB |
Output is correct |
| 49 |
Correct |
45 ms |
10284 KB |
Output is correct |
| 50 |
Correct |
45 ms |
9840 KB |
Output is correct |
| 51 |
Correct |
55 ms |
8524 KB |
Output is correct |
| 52 |
Correct |
60 ms |
8600 KB |
Output is correct |
| 53 |
Correct |
54 ms |
8572 KB |
Output is correct |
| 54 |
Correct |
49 ms |
8548 KB |
Output is correct |
| 55 |
Correct |
54 ms |
8008 KB |
Output is correct |
| 56 |
Correct |
45 ms |
8092 KB |
Output is correct |
| 57 |
Correct |
31 ms |
9680 KB |
Output is correct |
