#include<bits/stdc++.h>
#pragma warning(disable:4996)
using namespace std;
using ll = long long;
//http://kmjp.hatenablog.jp/entry/2016/08/27/0930
int N, M;
int U[1000];
ll dp[200][1001];
vector<pair<int, int>>E[200];
void dfs(int p, int c0) {
	for (int i = 0; i <= M; i++) {
		dp[c0][i] = U[c0];//dp[親][時間]を親地点の獲得ポイントで初期化
	}
	for (auto e : E[c0]) {
		if (e.first != p) {//子が親でなければ
			int c1 = e.first;
			int cost = e.second;
			dfs(c0, c1);
			for (int i = M; i >= 0; i--) {
				for (int j = 0; j + cost <= i; j++) {
					dp[c0][i] = max(dp[c0][i], dp[c0][i - (j + cost)] + dp[c1][j]);
				}
			}
		}
	}
}
int main() {
	scanf("%d %d", &N, &M);
	M /= 2;
	for (int i = 0; i < N; i++) {
		scanf("%d", &U[i]);
	}
	for (int i = 0; i < N - 1; i++) {
		int from, to, cost;
		scanf("%d %d %d", &from, &to, &cost);
		E[from].push_back(make_pair(to, cost));
		E[to].push_back(make_pair(from, cost));
	}
	dfs(-1, 0);
	printf("%lld\n", *max_element(dp[0], dp[0] + M + 1));

}