/*
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("unroll-loops")
*/
// lethal option
#include<bits/stdc++.h>
using namespace std;
#define all(flg) flg.begin(), flg.end()
#define int long long
#define pb push_back
#define fi first
#define se second
#define endl "\n"
#define eb emplace_back
#define ii pair<int, int>
#define vi vector<int>
#define PI 3.141592653589793238462643383279502884
#define ll long long
#define ld long double
#define for1(i, ff, gg) for(int i = ff; i <= gg; ++i)
#define for2(i, ff, gg) for(int i = ff; i >= gg; --i)
const ll mod = 1e9 + 7;
const int maxN = 300005;
const ll oo = 1e18 + 7;
int n, a[maxN];
int x, y, z, k;
int ans = 0;
vector<int> vc[maxN];
int dfs(int node, int par){
vector<int> eli;
int sum = a[node];
for(int cc : vc[node]) if(cc != par){
eli.pb(dfs(cc, node));
}
sort(all(eli));
for(int cc : eli) sum += cc;
while(sum > k){
sum -= eli.back(); eli.pop_back();
++ans;
}
return sum;
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(NULL);
cout.tie(NULL);
cin >> n >> k;
for1(i, 1, n) cin >> a[i];
for1(i, 2, n){
cin >> x >> y;
vc[x].pb(y);
vc[y].pb(x);
}
dfs(1, 0);
cout << ans << endl;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
7252 KB |
Output is correct |
| 2 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 3 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 4 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 5 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 6 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 7 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 8 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 9 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 10 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 11 |
Correct |
4 ms |
7304 KB |
Output is correct |
| 12 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 13 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 14 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 15 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 16 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 17 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 18 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 19 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 20 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 21 |
Correct |
4 ms |
7252 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
41 ms |
22120 KB |
Output is correct |
| 2 |
Correct |
41 ms |
22196 KB |
Output is correct |
| 3 |
Correct |
41 ms |
22220 KB |
Output is correct |
| 4 |
Correct |
45 ms |
22224 KB |
Output is correct |
| 5 |
Correct |
41 ms |
22176 KB |
Output is correct |
| 6 |
Correct |
40 ms |
22216 KB |
Output is correct |
| 7 |
Correct |
40 ms |
22204 KB |
Output is correct |
| 8 |
Correct |
38 ms |
22224 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
7252 KB |
Output is correct |
| 2 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 3 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 4 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 5 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 6 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 7 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 8 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 9 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 10 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 11 |
Correct |
4 ms |
7304 KB |
Output is correct |
| 12 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 13 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 14 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 15 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 16 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 17 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 18 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 19 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 20 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 21 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 22 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 23 |
Correct |
3 ms |
7380 KB |
Output is correct |
| 24 |
Correct |
5 ms |
7380 KB |
Output is correct |
| 25 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 26 |
Correct |
4 ms |
7320 KB |
Output is correct |
| 27 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 28 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 29 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 30 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 31 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 32 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 33 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 34 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 35 |
Correct |
4 ms |
7348 KB |
Output is correct |
| 36 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 37 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 38 |
Correct |
4 ms |
7380 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
7252 KB |
Output is correct |
| 2 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 3 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 4 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 5 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 6 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 7 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 8 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 9 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 10 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 11 |
Correct |
4 ms |
7304 KB |
Output is correct |
| 12 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 13 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 14 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 15 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 16 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 17 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 18 |
Correct |
3 ms |
7252 KB |
Output is correct |
| 19 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 20 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 21 |
Correct |
4 ms |
7252 KB |
Output is correct |
| 22 |
Correct |
41 ms |
22120 KB |
Output is correct |
| 23 |
Correct |
41 ms |
22196 KB |
Output is correct |
| 24 |
Correct |
41 ms |
22220 KB |
Output is correct |
| 25 |
Correct |
45 ms |
22224 KB |
Output is correct |
| 26 |
Correct |
41 ms |
22176 KB |
Output is correct |
| 27 |
Correct |
40 ms |
22216 KB |
Output is correct |
| 28 |
Correct |
40 ms |
22204 KB |
Output is correct |
| 29 |
Correct |
38 ms |
22224 KB |
Output is correct |
| 30 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 31 |
Correct |
3 ms |
7380 KB |
Output is correct |
| 32 |
Correct |
5 ms |
7380 KB |
Output is correct |
| 33 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 34 |
Correct |
4 ms |
7320 KB |
Output is correct |
| 35 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 36 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 37 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 38 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 39 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 40 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 41 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 42 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 43 |
Correct |
4 ms |
7348 KB |
Output is correct |
| 44 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 45 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 46 |
Correct |
4 ms |
7380 KB |
Output is correct |
| 47 |
Correct |
40 ms |
15624 KB |
Output is correct |
| 48 |
Correct |
42 ms |
13808 KB |
Output is correct |
| 49 |
Correct |
43 ms |
13160 KB |
Output is correct |
| 50 |
Correct |
45 ms |
12936 KB |
Output is correct |
| 51 |
Correct |
46 ms |
11756 KB |
Output is correct |
| 52 |
Correct |
46 ms |
11876 KB |
Output is correct |
| 53 |
Correct |
46 ms |
11880 KB |
Output is correct |
| 54 |
Correct |
57 ms |
11876 KB |
Output is correct |
| 55 |
Correct |
42 ms |
11880 KB |
Output is correct |
| 56 |
Correct |
44 ms |
11860 KB |
Output is correct |
| 57 |
Correct |
31 ms |
13612 KB |
Output is correct |
