#include <bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <long double, pii> muchie;
const int NMAX = 100001;
const ll VMAX = 101;
const ll INF = (1LL << 60);
const ll MOD = 998244353;
const ll BLOCK = 447;
const ll base = 117;
const int nr_of_bits = 18;
int n, V;
int p[NMAX];
vector <int> v[NMAX];
int dp[NMAX][VMAX];
void DFS(int node, int p){
for(auto x : v[node]){
if(x == p) continue;
DFS(x, node);
}
return;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int i;
cin >> n >> V;
for(i = 1; i <= n; i++) cin >> p[i];
for(i = 1; i < n; i++){
int a, b;
cin >> a >> b;
v[a].push_back(b);
v[b].push_back(a);
}
DFS(1, 0);
return 0;
}
