#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
#define pb push_back
#define rep(i, s, n) for (int i = s; i < n; i++)
#define rrep(i, s, n) for (int i = (n)-1; i >= (s); i--)
#define all(a) a.begin(),a.end()
typedef pair<int,int>pint;
typedef vector<int>vint;
typedef vector<pint>vpint;
const long long MOD = 1000000007, INF = 1e18;
template<class T>inline bool chmax(T& a,T b){if(a<b){a=b;return true;}return false;}
template<class T>inline bool chmin(T& a,T b){if(a>b){a=b;return true;}return false;}
string get_str(string s) {
	s+=',';
	string ret="";
	for(int i=0; i<s.size(); i++) {
		if(s[i]==',') ret+="=%ld, ";
		else ret+=s[i];
	}
	return ret;
}
#define dump(...) printf(get_str(#__VA_ARGS__).c_str(),__VA_ARGS__);cout<<endl
 
#define endl '\n'
#define IOS()                     \
	ios_base::sync_with_stdio(0); \
	cin.tie(0)
 
//******************************************************************************
template<typename T>vector<T>
make_v(size_t a){return vector<T>(a);}
template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
	return vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}
 
template<typename T,typename V>
typename enable_if<is_class<T>::value==0>::type
fill_v(T &t,const V &v){t=v;}
 
template<typename T,typename V>
typename enable_if<is_class<T>::value!=0>::type
fill_v(T &t,const V &v){
	for(auto &e:t) fill_v(e,v);
}

int N,M;
int u[202];
vpint g[2020];
int dp[303][3030];

void dfs(int now,int par){
	rep(i,0,M+1)dp[now][i] = u[now];
	for(auto e:g[now]){
		if(e.fi==par)continue;
		dfs(e.fi,now);
		rrep(i,0,M+1){
			rep(j,0,M+1){
				if(i<e.se*2+j)break;
				chmax(dp[now][i],dp[now][i-e.se*2-j]+dp[e.fi][j]);
			}
		}
	}
}

signed main()
{
	//IOS();
	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].push_back({b,c});
		g[b].push_back({a,c});
	}
	memset(dp,-1,sizeof(dp));
	dfs(0,-1);
	int ans = 0;
	rep(i,0,M+1)chmax(ans,dp[0][i]);
	cout<<ans<<endl;
}