#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> P;
int n,m;
ll U[202];
vector<P> g[202];
ll dp[202][2002];
void dfs(int s, int prev) {
  
  for(int i = 0; i <= m; i++) dp[s][i] = U[s];
 
  for(int i = 0; i < g[s].size(); i++) {
    int u = g[s][i].first;
    int c = g[s][i].second;
    if(u == prev) continue;
    dfs(u,s);

    for(int i = m; i >= 0; i--) {
      for(int j = 0; j + c <= i; j++) {
	dp[s][i] = max(dp[s][i],dp[s][i-(j+c)] + dp[u][j]);
      }
    }
  }
}

int main() {
  cin >> n >> m;
  m /= 2;
  for(int i = 0; i < n; i++) cin >> U[i];
  for(int i = 0; i < n - 1; i++) {
    int a,b,c;
    cin >> a >> b >> c;
    g[a].push_back(P(b,c));
    g[b].push_back(P(a,c));
  }

  dfs(0,-1);
 
  ll ans = 0;
  for(int i = 0; i <= m; i++) ans = max(ans,dp[0][i]);

  cout << ans << endl;
}