oj.uz

답안 #945666

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
945666 2024-03-14T06:10:45 Z vjudge1 Magic Tree (CEOI19_magictree) C++17
61 / 100
 675 ms 804972 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(), x.end()
#define size(x) (int)x.size()

template<class S, class T>
bool chmin(S &a, const T &b) {
  return a > b ? (a = b) == b : false;
}
template<class S, class T>
bool chmax(S &a, const T &b) {
  return a < b ? (a = b) == b : false;
}

void compress(vector<int>& a) {
  vector<int> v;
  map<int, int> mp;
  for (int i = 1; i < size(a); ++i) {
    if (mp.count(a[i])) continue;
    v.push_back(a[i]);
    mp[a[i]];
  }
  sort(all(v));
  for (int i = 0; i < size(v); ++i) {
    mp[v[i]] = i + 1;
  }
  for (int i = 1; i < size(a); ++i) {
    a[i] = mp[a[i]];
  }
}

const int N = 1e5 + 1;

int dp[N][1001];
vector<vector<int>> g;
vector<pair<int, int>> f;

void dfs(int v) {
  for (int to : g[v]) {
    dfs(to);
    int Max = 0;
    for (int k = 0; k <= 1000; ++k) {
      chmax(Max, dp[to][k]);
      dp[v][k] += Max;
    }
  }
  if (f[v].second != -1) {
    int cur = 0;
    for (int to : g[v]) {
      cur += dp[to][f[v].second];
    }
    chmax(dp[v][f[v].second], cur + f[v].first);
  }
  for (int k = 1; k <= 1000; ++k) {
    chmax(dp[v][k], dp[v][k - 1]);
  }
}

struct fenwick {
  int n;
  vector<int> t;
  fenwick(int n) {
    this -> n = n;
    t.assign(n + 1, 0);
  }
  void upd(int i, int delta) {
    for (; i <= n; i += i & -i) {
      chmax(t[i], delta);
    }
  }
  int get(int i) {
    int res = 0;
    for (; i > 0; i -= i & -i) {
      chmax(res, t[i]);
    }
    return res;
  }
};

signed main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int n, m, k;
  cin >> n >> m >> k;
  int p[n + 1];
  p[1] = -1;
  vector<int> u(m + 1), d(m + 1), w(m + 1);
  g.resize(n + 1);
  f.assign(n + 1, {-1, -1});
  for (int i = 2; i <= n; ++i) {
    cin >> p[i];
    g[p[i]].push_back(i);
  }
  bool flag = true;
  for (int i = 1; i <= m; ++i) {
    cin >> u[i] >> d[i] >> w[i];
    if (!g[u[i]].empty()) flag = false;
  }
  if (flag) {
    cout << accumulate(w.begin() + 1, w.end(), 0ll);
    return 0;
  }
  compress(d);
  for (int i = 1; i <= m; ++i) {
    f[u[i]] = {w[i], d[i]};
  }
  if (m <= 1000 || k <= 20) {
    dfs(1);
    cout << *max_element(dp[1], dp[1] + 1001);
    return 0;
  }
  fenwick fenw(k);
  for (int i = n; i >= 1; --i) {
    if (f[i].second != -1) {
      fenw.upd(f[i].second, fenw.get(f[i].second) + f[i].first);
    }
  }
  cout << fenw.get(k);
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 432 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 604 KB Output is correct

Subtask #2
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 7260 KB Output is correct
2 Correct 15 ms 8028 KB Output is correct
3 Correct 30 ms 8528 KB Output is correct
4 Correct 26 ms 8412 KB Output is correct
5 Correct 28 ms 8540 KB Output is correct

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8280 KB Output is correct
2 Correct 4 ms 8280 KB Output is correct
3 Correct 4 ms 8284 KB Output is correct
4 Correct 58 ms 15052 KB Output is correct
5 Correct 58 ms 14868 KB Output is correct
6 Correct 80 ms 15052 KB Output is correct

Subtask #4
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 633 ms 773508 KB Output is correct
2 Correct 647 ms 775440 KB Output is correct
3 Correct 590 ms 791848 KB Output is correct
4 Correct 614 ms 749260 KB Output is correct
5 Correct 508 ms 804776 KB Output is correct

Subtask #5
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 432 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 604 KB Output is correct
10 Correct 675 ms 773792 KB Output is correct
11 Correct 602 ms 774156 KB Output is correct
12 Correct 493 ms 791012 KB Output is correct
13 Correct 616 ms 748632 KB Output is correct
14 Correct 429 ms 804972 KB Output is correct

Subtask #6
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 114512 KB Output is correct
2 Correct 384 ms 502612 KB Output is correct
3 Correct 384 ms 505240 KB Output is correct
4 Correct 375 ms 501592 KB Output is correct
5 Correct 192 ms 15436 KB Output is correct
6 Correct 385 ms 482608 KB Output is correct
7 Correct 416 ms 719008 KB Output is correct

Subtask #7
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 432 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 604 KB Output is correct
10 Correct 5 ms 8280 KB Output is correct
11 Correct 4 ms 8280 KB Output is correct
12 Correct 4 ms 8284 KB Output is correct
13 Correct 58 ms 15052 KB Output is correct
14 Correct 58 ms 14868 KB Output is correct
15 Correct 80 ms 15052 KB Output is correct
16 Correct 675 ms 773792 KB Output is correct
17 Correct 602 ms 774156 KB Output is correct
18 Correct 493 ms 791012 KB Output is correct
19 Correct 616 ms 748632 KB Output is correct
20 Correct 429 ms 804972 KB Output is correct
21 Incorrect 9 ms 2136 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #8
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 432 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 604 KB Output is correct
10 Correct 18 ms 7260 KB Output is correct
11 Correct 15 ms 8028 KB Output is correct
12 Correct 30 ms 8528 KB Output is correct
13 Correct 26 ms 8412 KB Output is correct
14 Correct 28 ms 8540 KB Output is correct
15 Correct 5 ms 8280 KB Output is correct
16 Correct 4 ms 8280 KB Output is correct
17 Correct 4 ms 8284 KB Output is correct
18 Correct 58 ms 15052 KB Output is correct
19 Correct 58 ms 14868 KB Output is correct
20 Correct 80 ms 15052 KB Output is correct
21 Correct 633 ms 773508 KB Output is correct
22 Correct 647 ms 775440 KB Output is correct
23 Correct 590 ms 791848 KB Output is correct
24 Correct 614 ms 749260 KB Output is correct
25 Correct 508 ms 804776 KB Output is correct
26 Correct 675 ms 773792 KB Output is correct
27 Correct 602 ms 774156 KB Output is correct
28 Correct 493 ms 791012 KB Output is correct
29 Correct 616 ms 748632 KB Output is correct
30 Correct 429 ms 804972 KB Output is correct
31 Correct 67 ms 114512 KB Output is correct
32 Correct 384 ms 502612 KB Output is correct
33 Correct 384 ms 505240 KB Output is correct
34 Correct 375 ms 501592 KB Output is correct
35 Correct 192 ms 15436 KB Output is correct
36 Correct 385 ms 482608 KB Output is correct
37 Correct 416 ms 719008 KB Output is correct
38 Incorrect 9 ms 2136 KB Output isn't correct
39 Halted 0 ms 0 KB -