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답안 #1023172

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1023172 2024-07-14T11:47:34 Z avighna Mountains (NOI20_mountains) C++17
100 / 100
 80 ms 11900 KB 
#include <bits/stdc++.h>

class FenwickTree {
public:
  std::vector<int> f;
  int n;

  FenwickTree(int n) {
    this->n = n;
    f.resize(n + 1);
  }

  void add(int idx, int del) {
    ++idx;
    for (int i = idx; i <= n; i += i & (-i)) {
      f[i] += del;
    }
  }

  int query(int idx) {
    ++idx;
    int ans = 0;
    for (int i = idx; i >= 1; i -= i & (-i)) {
      ans += f[i];
    }
    return ans;
  }
  int query(int l, int r) {
    if (l > r) {
      return 0;
    }
    int ans = query(r);
    if (l - 1 >= 0) {
      ans -= query(l - 1);
    }
    return ans;
  }
};

int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(nullptr);

  int n;
  std::cin >> n;
  std::vector<std::pair<long long, int>> h(n);
  FenwickTree tree(n);
  for (int i = 0; i < n; ++i) {
    std::cin >> h[i].first;
    h[i].second = i;
    tree.add(i, 1);
  }
  std::sort(h.begin(), h.end());

  std::stack<int> stk;
  long long ans = 0;
  for (int i = 0; i < n; ++i) {
    if (i != 0 and h[i].first != h[i - 1].first) {
      while (!stk.empty()) {
        tree.add(stk.top(), -1);
        stk.pop();
      }
    }
    long long left = tree.query(0, h[i].second);
    long long right = tree.query(h[i].second, n - 1);
    // above is >=, so make it <
    ans += (h[i].second - left + 1) * (n - h[i].second - right);
    stk.push(h[i].second);
  }
  std::cout << ans << "\n";
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 57 ms 11860 KB Output is correct
3 Correct 55 ms 11688 KB Output is correct
4 Correct 52 ms 11824 KB Output is correct
5 Correct 52 ms 11860 KB Output is correct
6 Correct 51 ms 11856 KB Output is correct
7 Correct 51 ms 11688 KB Output is correct
8 Correct 50 ms 11860 KB Output is correct
9 Correct 54 ms 11860 KB Output is correct
10 Correct 56 ms 11860 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 7352 KB Output is correct
2 Correct 48 ms 7340 KB Output is correct
3 Correct 47 ms 7504 KB Output is correct
4 Correct 44 ms 7508 KB Output is correct
5 Correct 45 ms 7420 KB Output is correct
6 Correct 44 ms 7504 KB Output is correct
7 Correct 43 ms 7504 KB Output is correct
8 Correct 30 ms 7508 KB Output is correct
9 Correct 29 ms 7432 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 7352 KB Output is correct
2 Correct 48 ms 7340 KB Output is correct
3 Correct 47 ms 7504 KB Output is correct
4 Correct 44 ms 7508 KB Output is correct
5 Correct 45 ms 7420 KB Output is correct
6 Correct 44 ms 7504 KB Output is correct
7 Correct 43 ms 7504 KB Output is correct
8 Correct 30 ms 7508 KB Output is correct
9 Correct 29 ms 7432 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 61 ms 7180 KB Output is correct
12 Correct 56 ms 7004 KB Output is correct
13 Correct 57 ms 7000 KB Output is correct
14 Correct 56 ms 7000 KB Output is correct
15 Correct 67 ms 7184 KB Output is correct
16 Correct 60 ms 6960 KB Output is correct
17 Correct 56 ms 7168 KB Output is correct
18 Correct 31 ms 7004 KB Output is correct
19 Correct 31 ms 7092 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #4
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct

Subtask #5
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 4 ms 604 KB Output is correct
12 Correct 2 ms 700 KB Output is correct
13 Correct 2 ms 696 KB Output is correct
14 Correct 3 ms 700 KB Output is correct
15 Correct 3 ms 692 KB Output is correct
16 Correct 2 ms 724 KB Output is correct
17 Correct 3 ms 600 KB Output is correct
18 Correct 3 ms 604 KB Output is correct
19 Correct 2 ms 604 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 7352 KB Output is correct
2 Correct 48 ms 7340 KB Output is correct
3 Correct 47 ms 7504 KB Output is correct
4 Correct 44 ms 7508 KB Output is correct
5 Correct 45 ms 7420 KB Output is correct
6 Correct 44 ms 7504 KB Output is correct
7 Correct 43 ms 7504 KB Output is correct
8 Correct 30 ms 7508 KB Output is correct
9 Correct 29 ms 7432 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 61 ms 7180 KB Output is correct
12 Correct 56 ms 7004 KB Output is correct
13 Correct 57 ms 7000 KB Output is correct
14 Correct 56 ms 7000 KB Output is correct
15 Correct 67 ms 7184 KB Output is correct
16 Correct 60 ms 6960 KB Output is correct
17 Correct 56 ms 7168 KB Output is correct
18 Correct 31 ms 7004 KB Output is correct
19 Correct 31 ms 7092 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 60 ms 8044 KB Output is correct
22 Correct 61 ms 8016 KB Output is correct
23 Correct 62 ms 8028 KB Output is correct
24 Correct 61 ms 7852 KB Output is correct
25 Correct 65 ms 8016 KB Output is correct
26 Correct 62 ms 8024 KB Output is correct
27 Correct 62 ms 8016 KB Output is correct
28 Correct 42 ms 8016 KB Output is correct
29 Correct 35 ms 8028 KB Output is correct
30 Correct 0 ms 344 KB Output is correct

Subtask #7
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 57 ms 11860 KB Output is correct
3 Correct 55 ms 11688 KB Output is correct
4 Correct 52 ms 11824 KB Output is correct
5 Correct 52 ms 11860 KB Output is correct
6 Correct 51 ms 11856 KB Output is correct
7 Correct 51 ms 11688 KB Output is correct
8 Correct 50 ms 11860 KB Output is correct
9 Correct 54 ms 11860 KB Output is correct
10 Correct 56 ms 11860 KB Output is correct
11 Correct 42 ms 7352 KB Output is correct
12 Correct 48 ms 7340 KB Output is correct
13 Correct 47 ms 7504 KB Output is correct
14 Correct 44 ms 7508 KB Output is correct
15 Correct 45 ms 7420 KB Output is correct
16 Correct 44 ms 7504 KB Output is correct
17 Correct 43 ms 7504 KB Output is correct
18 Correct 30 ms 7508 KB Output is correct
19 Correct 29 ms 7432 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 61 ms 7180 KB Output is correct
22 Correct 56 ms 7004 KB Output is correct
23 Correct 57 ms 7000 KB Output is correct
24 Correct 56 ms 7000 KB Output is correct
25 Correct 67 ms 7184 KB Output is correct
26 Correct 60 ms 6960 KB Output is correct
27 Correct 56 ms 7168 KB Output is correct
28 Correct 31 ms 7004 KB Output is correct
29 Correct 31 ms 7092 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 4 ms 604 KB Output is correct
42 Correct 2 ms 700 KB Output is correct
43 Correct 2 ms 696 KB Output is correct
44 Correct 3 ms 700 KB Output is correct
45 Correct 3 ms 692 KB Output is correct
46 Correct 2 ms 724 KB Output is correct
47 Correct 3 ms 600 KB Output is correct
48 Correct 3 ms 604 KB Output is correct
49 Correct 2 ms 604 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 60 ms 8044 KB Output is correct
52 Correct 61 ms 8016 KB Output is correct
53 Correct 62 ms 8028 KB Output is correct
54 Correct 61 ms 7852 KB Output is correct
55 Correct 65 ms 8016 KB Output is correct
56 Correct 62 ms 8024 KB Output is correct
57 Correct 62 ms 8016 KB Output is correct
58 Correct 42 ms 8016 KB Output is correct
59 Correct 35 ms 8028 KB Output is correct
60 Correct 0 ms 344 KB Output is correct
61 Correct 78 ms 11808 KB Output is correct
62 Correct 74 ms 11856 KB Output is correct
63 Correct 73 ms 11684 KB Output is correct
64 Correct 75 ms 11696 KB Output is correct
65 Correct 75 ms 11860 KB Output is correct
66 Correct 74 ms 11864 KB Output is correct
67 Correct 75 ms 11700 KB Output is correct
68 Correct 80 ms 11900 KB Output is correct
69 Correct 62 ms 8028 KB Output is correct
70 Correct 0 ms 344 KB Output is correct