#include <iostream>
using namespace std;
typedef long long ll;
const int maxn = 5e4 + 10;
const int maxk = 155;
const ll INF = 1e18;
int n, k;
vector<int> graph[maxn];
ll v[maxn];
vector<int> top_sort;
int subtree_size[maxn];
ll dp[maxn][maxk];
void dfs(int node, int parent) {
    subtree_size[node] = 1;
    for(int neighbour : graph[node]) {
        if(neighbour != parent) {
            dfs(neighbour, node);
            subtree_size[node] += subtree_size[neighbour];
        }
    }
    top_sort.push_back(node);
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin >> n >> k;
    
    for(int i = 0; i < n; i++) {
        cin >> v[i];
    }
    for(int i = 1; i < n; i++) {
        int a, b;
        cin >> a >> b;
        a--; b--;
        
        graph[a].push_back(b);
        graph[b].push_back(a);
    }
    dfs(0, -1);
    reverse(top_sort.begin(), top_sort.end());
    for(int i = 0; i < maxn; i++) {
        for(int j = 0; j < maxk; j++) {
            dp[i][j] = -INF;
        }
    }
    dp[0][k] = 0;
    
    for(int i = 0; i < n; i++) {
        int node = top_sort[i];
        for(int j = 0; j <= k; j++) {
            if(dp[i][j] == -INF) continue;
            dp[i + 1][j] = max(dp[i + 1][j], dp[i][j] + v[node]);
            if(j >= 1) {
                dp[i + subtree_size[node]][j - 1] = max(dp[i + subtree_size[node]][j - 1], dp[i][j]);
            }
        }
    }
    ll res = -INF;
    for(int j = 0; j <= k; j++) {
        res = max(res, dp[n][j]);
    }
    cout << res << endl;
    return 0;
}