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Submission #1014241

# Submission time Handle Problem Language Result Execution time Memory
1014241 2024-07-04T15:05:17 Z MilosMilutinovic Chase (CEOI17_chase) C++14
100 / 100
 481 ms 344476 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 100100;
const int K = 105;

long long dp[N][K][2][2];

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, k;
  cin >> n >> k;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  vector<vector<int>> g(n);
  for (int i = 1; i < n; i++) {
    int u, v;
    cin >> u >> v;
    --u; --v;
    g[u].push_back(v);
    g[v].push_back(u);
  }
  vector<long long> s(n);
  for (int i = 0; i < n; i++) {
    for (int j : g[i]) {
      s[i] += a[j];
    }
  }
  long long res = 0;
  function<void(int, int)> Solve = [&](int v, int pv) {
    dp[v][1][0][1] = s[v];
    dp[v][1][1][1] = s[v];
    for (int i = 1; i <= k; i++) {
      for (int d = 0; d < 2; d++) {
        for (int t = 0; t < 2; t++) {
          dp[v][i][d][t] = max(dp[v][i][d][t], dp[v][i - 1][d][t]);
        }
      }
    }
    for (int u : g[v]) {
      if (u == pv) {
        continue;
      }
      Solve(u, v);
      for (int i = 0; i <= k; i++) {
        for (int me = 0; me < 2; me++) {
          for (int he = 0; he < 2; he++) {
            {
              long long ft = (he == 0 ? 0 : -a[v]);
              res = max(res, dp[v][i][0][me] + dp[u][k - i][1][he] + ft);
            }
            {
              long long ft = (me == 0 ? 0 : -a[u]);
              res = max(res, dp[v][i][1][me] + dp[u][k - i][0][he] + ft);
            }
          }
        }
      }
      for (int i = 0; i <= k; i++) {
        for (int me = 0; me < 2; me++) {
          for (int he = 0; he < 2; he++) {
            long long ft = (me == 0 ? 0 : s[v] - a[u]);
            dp[v][i + me][0][me] = max(dp[v][i + me][0][me], dp[u][i][0][he] + ft);
          }
        }
      }
      for (int i = 0; i <= k; i++) {
        for (int me = 0; me < 2; me++) {
          for (int he = 0; he < 2; he++) {
            long long ft = (me == 0 ? 0 : s[v]);
            if (he == 1) {
              ft -= a[v];
            }
            dp[v][i + me][1][me] = max(dp[v][i + me][1][me], dp[u][i][1][he] + ft);
          }
        }
      }
      for (int i = 1; i <= k; i++) {
        for (int d = 0; d < 2; d++) {
          for (int t = 0; t < 2; t++) {
            dp[v][i][d][t] = max(dp[v][i][d][t], dp[v][i - 1][d][t]);
          }
        }
      }
    }
  };
  Solve(0, 0);
  for (int i = 0; i < n; i++) {
    for (int j = 0; j <= k; j++) {
      for (int d = 0; d < 2; d++) {
        for (int t = 0; t < 2; t++) {
          res = max(res, dp[i][j][d][t]);
        }
      }
    }
  }
  cout << res << '\n';
  return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 5 ms 3676 KB Output is correct
8 Correct 2 ms 3676 KB Output is correct
9 Correct 2 ms 3676 KB Output is correct
10 Correct 4 ms 3672 KB Output is correct
11 Correct 2 ms 3676 KB Output is correct
12 Correct 2 ms 3676 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 403 ms 344304 KB Output is correct
2 Correct 414 ms 344476 KB Output is correct
3 Correct 413 ms 336236 KB Output is correct
4 Correct 135 ms 335952 KB Output is correct
5 Correct 441 ms 335832 KB Output is correct
6 Correct 447 ms 335868 KB Output is correct
7 Correct 481 ms 335972 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 5 ms 3676 KB Output is correct
8 Correct 2 ms 3676 KB Output is correct
9 Correct 2 ms 3676 KB Output is correct
10 Correct 4 ms 3672 KB Output is correct
11 Correct 2 ms 3676 KB Output is correct
12 Correct 2 ms 3676 KB Output is correct
13 Correct 403 ms 344304 KB Output is correct
14 Correct 414 ms 344476 KB Output is correct
15 Correct 413 ms 336236 KB Output is correct
16 Correct 135 ms 335952 KB Output is correct
17 Correct 441 ms 335832 KB Output is correct
18 Correct 447 ms 335868 KB Output is correct
19 Correct 481 ms 335972 KB Output is correct
20 Correct 414 ms 335820 KB Output is correct
21 Correct 153 ms 335952 KB Output is correct
22 Correct 445 ms 335768 KB Output is correct
23 Correct 154 ms 335952 KB Output is correct
24 Correct 434 ms 335956 KB Output is correct
25 Correct 385 ms 336076 KB Output is correct
26 Correct 419 ms 344400 KB Output is correct
27 Correct 433 ms 344404 KB Output is correct