//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <string>
#include <cstring>
#include <ctime>


using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v; }
template<class T> inline string toString(T x) { ostringstream sout; sout << x; return sout.str(); }

//math
//-------------------------------------------
template<class T> inline T sqr(T x) { return x * x; }

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define EXISTch(s,c) ((((s).find_first_of(c)) != std::string::npos)? 1 : 0)//cがあれば1 if(1)
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define rep(i,n)  FOR(i,0,n)
#define loop(n) FOR(i,0,n)
#define rrep(i,a,b) for(int i=(a);i>=(b);--i)
//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI = acos(-1.0);
const int INF = (int)1000000007;
const LL MOD = (LL)1000000007;//10^9+7
const LL INF2 = (LL)100000000000000000;//10^18

int N, M;
int U[3000];
LL dp[202][3000];
vector<pair<int, int>> E[202];

void dfs(int cur, int pre) {
	for (int i = 0; i < M + 1; i++) {
		dp[cur][i] = U[cur];
	}

	for (pair<int, int> e : E[cur])if (e.first != pre) {
		int tar = e.first;
		int cost = e.second;
		dfs(tar, cur);

		for (int i = M; i >=0; i--) {
			for (int j = 0; j + 2*cost <= i; j++) {
				dp[cur][i] = max(dp[cur][i], dp[cur][i - (j + 2*cost)] + dp[tar][j]);
			}
		}
	}
}

int main() {

	cin >> N >> M;

	for (int i = 0; i < N; i++)cin >> U[i];

	for (int i = 0; i < N - 1; i++) {
		int x, y, r; cin >> x >> y >> r;

		E[x].push_back({ y,r });
		E[y].push_back({ x,r });
	}

	dfs(0, -1);

	LL mx = -1;
	for (LL i : dp[0]) {
		mx = max(mx, i);
	}

	cout << mx << endl;

	return 0;
}