Submission #673728

#	Time	Username	Problem	Language	Result	Execution time	Memory
673728		MilosMilutinovic	Dostavljač (COCI18_dostavljac)	C++14	126 / 140	678 ms	14108 KiB

dostavljac

/**
 *    author:  wxhtzdy
 *    created: 21.12.2022 21:21:48
**/
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int n, m;
  cin >> n >> m;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  vector<vector<int>> g(n);
  for (int i = 0; i < n - 1; i++) {
    int u, v;
    cin >> u >> v;
    --u; --v;
    g[u].push_back(v);          
    g[v].push_back(u);
  }
  vector<vector<vector<int>>> dp(n, vector<vector<int>>(m + 1, vector<int>(2)));
  function<void(int, int)> Solve = [&](int v, int pv) {
    for (int u : g[v]) {
      if (u == pv) {
        continue;
      }
      Solve(u, v);
      for (int i = m - 1; i >= 0; i--) {
        for (int j = 0; j <= m; j++) {
          int new_i = j + i + 2;
          if (new_i <= m) {
            dp[v][new_i][1] = max(dp[v][new_i][1], dp[v][i][1] + dp[u][j][0]);
            dp[v][new_i][0] = max(dp[v][new_i][0], dp[v][i][0] + dp[u][j][0]);
            dp[v][new_i - 1][1] = max(dp[v][new_i - 1][1], dp[v][i][0] + dp[u][j][1]);
          }
        }
      }
    }                        
    for (int i = m - 1; i >= 0; i--) {
      dp[v][i + 1][0] = max(dp[v][i + 1][0], dp[v][i][0] + a[v]);
      dp[v][i + 1][1] = max(dp[v][i + 1][1], dp[v][i][1] + a[v]);
    }
  };
  Solve(0, 0);
  int ans = 0;
  for (int i = 0; i <= m; i++) {
    ans = max(ans, dp[0][i][1]);
    ans = max(ans, dp[0][i][0]);
  }
  cout << ans << '\n';
  return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 0 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 14 / 14
• Subtask 7: 14 / 14
• Subtask 8: 14 / 14
• Subtask 9: 14 / 14
• Subtask 10: 14 / 14