#include "bits/stdc++.h"

using namespace std;
typedef long long ll;
const ll MOD = 1e9 + 7;
typedef pair<int, int> P;
vector<P> G[200];
int U[200];
int dp[200][2001];
int N, M;
void solve(int v, int p) {
	int subdp[2][2001] = {};
	int b = 0;
	subdp[0][0] = U[v];
	for (P e : G[v]) {
		if (e.first == p) continue;
		solve(e.first, v);
		for (int i = 0; i <= M; i++) {
			subdp[b ^ 1][i] = max(subdp[b ^ 1][i], subdp[b][i]);
			for (int j = 2 * e.second; j <= i; j++) {
				subdp[b ^ 1][i] = max(subdp[b ^ 1][i], subdp[b][i - j] + dp[e.first][j - 2 * e.second]);
			}
		}
		for (int i = 0; i <= M; i++) subdp[b][i] = 0;
		b ^= 1;
	}
	for (int i = 0; i <= M; i++) dp[v][i] = subdp[b][i];
}
 int main() {
	 cin >> N >> M;
	 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].emplace_back(B, C);
		 G[B].emplace_back(A, C);
	 }
	 solve(0, -1);
	 int ans = 0;
	 for (int i = 0; i <= M; i++) ans = max(ans, dp[0][i]);
	 cout << ans << endl;
}