#include <bits/stdc++.h>
using namespace std;
const int maxn = 2e2 + 10;
int cnt = 0, dp[maxn][maxn] = {0}, w[maxn], head[maxn << 1], dep[maxn];
struct Edge {
  int to, next;
} e[maxn << 1];
int n, k;
void add(int u, int v) {
  e[++cnt].to = v;
  e[cnt].next = head[u];
  head[u] = cnt;
}
void dfs(int u, int fa) {
  dp[u][0] = w[u];
  dep[u] = 1;
  int maxdep = 0;
  for (int i = head[u]; i; i = e[i].next) {
    int v = e[i].to;
    if (v == fa) continue;
    dfs(v, u);
    maxdep = max(maxdep, dep[v]);
    dp[u][0] += dp[v][k];
  }
  dep[u] += maxdep;
  for (int i = 1; i < dep[u]; i++) {
    for (int j = head[u]; j; j = e[j].next) {
      int v = e[j].to;
      if (v == fa) continue;
      int cnt = dp[v][i - 1];
      for (int p = head[u]; p; p = e[p].next) {
        int x = e[p].to;
        if (x == v || x == fa) continue;
        cnt += dp[x][max(k - i, i - 1)];
      }
      dp[u][i] = max(dp[u][i], cnt);
    }
  }
  for (int i = n - 2; i >= 0; i--) {
    dp[u][i] = max(dp[u][i], dp[u][i + 1]);
  }
}
int main() {
  scanf("%d%d", &n, &k);
  for (int i = 1; i <= n; i++) scanf("%d", &w[i]);
  for (int i = 1; i < n; i++) {
    int a, b;
    scanf("%d%d", &a, &b);
    add(a, b);
    add(b, a);
  }
  dfs(1, 0);
  printf("%d\n", dp[1][0]);
}
