This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <iostream>
#include <vector>
using namespace std;
template <typename input_type>
input_type get() {
input_type input;
cin >> input;
return input;
}
const int max_num = (5e2 + 5), max_tmp = 2;
int sz, tm, ppr[max_num], dp[max_tmp][max_num][max_num];
vector <int> nghbr[max_num];
void DFS(int vrtx, int prnt) {
for (int i = 1; i < (tm + 1); i++) {
dp[0][vrtx][i] = ppr[vrtx];
dp[1][vrtx][i] = ppr[vrtx];
}
for (int ngh: nghbr[vrtx]) {
if (ngh != prnt) {
DFS(ngh, vrtx);
for (int i = tm; i > 0; i--) {
for (int j = 0; j < i; j++) {
dp[0][vrtx][i] = max(dp[0][vrtx][i], (max(dp[0][ngh][j], dp[1][ngh][j]) + dp[1][vrtx][i - j - 1]));
if (j != (i - 1)) {
dp[0][vrtx][i] = max(dp[0][vrtx][i], dp[1][ngh][j] + dp[0][vrtx][i - j - 2]);
dp[1][vrtx][i] = max(dp[1][vrtx][i], dp[1][ngh][j] + dp[1][vrtx][i - j - 2]);
}
}
}
}
}
}
int main() {
ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
sz = get<int>(); tm = get<int>();
for (int i = 1; i < (sz + 1); i++) {
ppr[i] = get<int>();
}
for (int i = 0; i < (sz - 1); i++) {
pair <int, int> endpnt = {get<int>(), get<int>()};
nghbr[endpnt.first].push_back(endpnt.second);
nghbr[endpnt.second].push_back(endpnt.first);
}
DFS(1, 0);
cout << max(dp[0][1][tm], dp[1][1][tm]);
return 0;
}
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