#include<bits/stdc++.h>
#define x first
#define y second
#define pb push_back
#define mp make_pair
#define in insert
#define up_b upper_bound
#define low_b lower_bound
#define sz(x) (int)x.size()
#define all(v) v.begin(),v.end()
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<int,ll> pil;
typedef pair<ll,int> pli;
typedef pair<ll,ll> pll;
const ll INF = 1e18;
const int inf = INT_MAX;
const ll mod = 1e9 + 7;
const int dx[4] = {0, 0, 1, -1};
const int dy[4] = {1, -1, 0, 0};
const int N = 1e5 + 5;
const int A = 26;
ll n, k, ans, a[N], d[N];
vector < int > g[N];
void dfs(int v, int p){
vector < int > val;
d[v] = a[v];
for(int i = 0; i < sz(g[v]); i++){
int to = g[v][i];
if(to != p){
dfs(to, v);
d[v] += d[to];
val.pb(d[to]);
}
}
sort(all(val));
reverse(all(val));
for(int i = 0; i < sz(val); i++){
if(d[v] > k){
d[v] -= val[i];
ans++;
}
else break;
}
}
int main(){
cin >> n >> k;
for(int i = 1; i <= n; i++){
cin >> a[i];
}
for(int i = 1; i < n; i++){
int u, v;
cin >> u >> v;
g[u].pb(v);
g[v].pb(u);
}
dfs(1, 0);
cout << ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
2680 KB |
Output is correct |
2 |
Correct |
5 ms |
2680 KB |
Output is correct |
3 |
Correct |
5 ms |
2764 KB |
Output is correct |
4 |
Correct |
5 ms |
2792 KB |
Output is correct |
5 |
Correct |
4 ms |
2792 KB |
Output is correct |
6 |
Correct |
5 ms |
2792 KB |
Output is correct |
7 |
Correct |
4 ms |
2792 KB |
Output is correct |
8 |
Correct |
6 ms |
2848 KB |
Output is correct |
9 |
Correct |
6 ms |
2896 KB |
Output is correct |
10 |
Correct |
5 ms |
2896 KB |
Output is correct |
11 |
Correct |
5 ms |
2924 KB |
Output is correct |
12 |
Correct |
5 ms |
2924 KB |
Output is correct |
13 |
Correct |
6 ms |
2924 KB |
Output is correct |
14 |
Correct |
5 ms |
2924 KB |
Output is correct |
15 |
Correct |
5 ms |
2924 KB |
Output is correct |
16 |
Correct |
5 ms |
2924 KB |
Output is correct |
17 |
Correct |
5 ms |
2924 KB |
Output is correct |
18 |
Correct |
4 ms |
2924 KB |
Output is correct |
19 |
Correct |
4 ms |
3008 KB |
Output is correct |
20 |
Correct |
4 ms |
3008 KB |
Output is correct |
21 |
Correct |
6 ms |
3008 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
184 ms |
18540 KB |
Output is correct |
2 |
Correct |
183 ms |
18540 KB |
Output is correct |
3 |
Correct |
186 ms |
18604 KB |
Output is correct |
4 |
Correct |
169 ms |
18604 KB |
Output is correct |
5 |
Correct |
183 ms |
18604 KB |
Output is correct |
6 |
Correct |
152 ms |
18604 KB |
Output is correct |
7 |
Correct |
189 ms |
18604 KB |
Output is correct |
8 |
Correct |
140 ms |
18668 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
2680 KB |
Output is correct |
2 |
Correct |
5 ms |
2680 KB |
Output is correct |
3 |
Correct |
5 ms |
2764 KB |
Output is correct |
4 |
Correct |
5 ms |
2792 KB |
Output is correct |
5 |
Correct |
4 ms |
2792 KB |
Output is correct |
6 |
Correct |
5 ms |
2792 KB |
Output is correct |
7 |
Correct |
4 ms |
2792 KB |
Output is correct |
8 |
Correct |
6 ms |
2848 KB |
Output is correct |
9 |
Correct |
6 ms |
2896 KB |
Output is correct |
10 |
Correct |
5 ms |
2896 KB |
Output is correct |
11 |
Correct |
5 ms |
2924 KB |
Output is correct |
12 |
Correct |
5 ms |
2924 KB |
Output is correct |
13 |
Correct |
6 ms |
2924 KB |
Output is correct |
14 |
Correct |
5 ms |
2924 KB |
Output is correct |
15 |
Correct |
5 ms |
2924 KB |
Output is correct |
16 |
Correct |
5 ms |
2924 KB |
Output is correct |
17 |
Correct |
5 ms |
2924 KB |
Output is correct |
18 |
Correct |
4 ms |
2924 KB |
Output is correct |
19 |
Correct |
4 ms |
3008 KB |
Output is correct |
20 |
Correct |
4 ms |
3008 KB |
Output is correct |
21 |
Correct |
6 ms |
3008 KB |
Output is correct |
22 |
Correct |
7 ms |
18668 KB |
Output is correct |
23 |
Correct |
6 ms |
18668 KB |
Output is correct |
24 |
Correct |
6 ms |
18668 KB |
Output is correct |
25 |
Correct |
6 ms |
18668 KB |
Output is correct |
26 |
Correct |
6 ms |
18668 KB |
Output is correct |
27 |
Correct |
9 ms |
18668 KB |
Output is correct |
28 |
Correct |
8 ms |
18668 KB |
Output is correct |
29 |
Correct |
8 ms |
18668 KB |
Output is correct |
30 |
Correct |
6 ms |
18668 KB |
Output is correct |
31 |
Correct |
6 ms |
18668 KB |
Output is correct |
32 |
Correct |
6 ms |
18668 KB |
Output is correct |
33 |
Correct |
6 ms |
18668 KB |
Output is correct |
34 |
Correct |
5 ms |
18668 KB |
Output is correct |
35 |
Correct |
7 ms |
18668 KB |
Output is correct |
36 |
Correct |
6 ms |
18668 KB |
Output is correct |
37 |
Correct |
7 ms |
18668 KB |
Output is correct |
38 |
Correct |
4 ms |
18668 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
2680 KB |
Output is correct |
2 |
Correct |
5 ms |
2680 KB |
Output is correct |
3 |
Correct |
5 ms |
2764 KB |
Output is correct |
4 |
Correct |
5 ms |
2792 KB |
Output is correct |
5 |
Correct |
4 ms |
2792 KB |
Output is correct |
6 |
Correct |
5 ms |
2792 KB |
Output is correct |
7 |
Correct |
4 ms |
2792 KB |
Output is correct |
8 |
Correct |
6 ms |
2848 KB |
Output is correct |
9 |
Correct |
6 ms |
2896 KB |
Output is correct |
10 |
Correct |
5 ms |
2896 KB |
Output is correct |
11 |
Correct |
5 ms |
2924 KB |
Output is correct |
12 |
Correct |
5 ms |
2924 KB |
Output is correct |
13 |
Correct |
6 ms |
2924 KB |
Output is correct |
14 |
Correct |
5 ms |
2924 KB |
Output is correct |
15 |
Correct |
5 ms |
2924 KB |
Output is correct |
16 |
Correct |
5 ms |
2924 KB |
Output is correct |
17 |
Correct |
5 ms |
2924 KB |
Output is correct |
18 |
Correct |
4 ms |
2924 KB |
Output is correct |
19 |
Correct |
4 ms |
3008 KB |
Output is correct |
20 |
Correct |
4 ms |
3008 KB |
Output is correct |
21 |
Correct |
6 ms |
3008 KB |
Output is correct |
22 |
Correct |
184 ms |
18540 KB |
Output is correct |
23 |
Correct |
183 ms |
18540 KB |
Output is correct |
24 |
Correct |
186 ms |
18604 KB |
Output is correct |
25 |
Correct |
169 ms |
18604 KB |
Output is correct |
26 |
Correct |
183 ms |
18604 KB |
Output is correct |
27 |
Correct |
152 ms |
18604 KB |
Output is correct |
28 |
Correct |
189 ms |
18604 KB |
Output is correct |
29 |
Correct |
140 ms |
18668 KB |
Output is correct |
30 |
Correct |
7 ms |
18668 KB |
Output is correct |
31 |
Correct |
6 ms |
18668 KB |
Output is correct |
32 |
Correct |
6 ms |
18668 KB |
Output is correct |
33 |
Correct |
6 ms |
18668 KB |
Output is correct |
34 |
Correct |
6 ms |
18668 KB |
Output is correct |
35 |
Correct |
9 ms |
18668 KB |
Output is correct |
36 |
Correct |
8 ms |
18668 KB |
Output is correct |
37 |
Correct |
8 ms |
18668 KB |
Output is correct |
38 |
Correct |
6 ms |
18668 KB |
Output is correct |
39 |
Correct |
6 ms |
18668 KB |
Output is correct |
40 |
Correct |
6 ms |
18668 KB |
Output is correct |
41 |
Correct |
6 ms |
18668 KB |
Output is correct |
42 |
Correct |
5 ms |
18668 KB |
Output is correct |
43 |
Correct |
7 ms |
18668 KB |
Output is correct |
44 |
Correct |
6 ms |
18668 KB |
Output is correct |
45 |
Correct |
7 ms |
18668 KB |
Output is correct |
46 |
Correct |
4 ms |
18668 KB |
Output is correct |
47 |
Correct |
160 ms |
18668 KB |
Output is correct |
48 |
Correct |
188 ms |
18668 KB |
Output is correct |
49 |
Correct |
183 ms |
18668 KB |
Output is correct |
50 |
Correct |
154 ms |
18668 KB |
Output is correct |
51 |
Correct |
199 ms |
18668 KB |
Output is correct |
52 |
Correct |
220 ms |
19800 KB |
Output is correct |
53 |
Correct |
225 ms |
21660 KB |
Output is correct |
54 |
Correct |
217 ms |
23744 KB |
Output is correct |
55 |
Correct |
203 ms |
25020 KB |
Output is correct |
56 |
Correct |
193 ms |
26480 KB |
Output is correct |
57 |
Correct |
129 ms |
28872 KB |
Output is correct |