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Submission #1036245

# Submission time Handle Problem Language Result Execution time Memory
1036245 2024-07-27T06:54:51 Z ind1v Mountains (NOI20_mountains) C++11
100 / 100
 121 ms 14360 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 3e5 + 5;

struct fenwick_tree {
  int f[N];
  
  fenwick_tree() {
    memset(f, 0, sizeof(f));
  }
  
  void upd(int i, int x) {
    for (; i < N; i += i & -i) {
      f[i] += x;
    }
  }
  
  int get(int i) {
    int r = 0;
    for (; i > 0; i -= i & -i) {
      r += f[i];
    }
    return r;
  }
  
  int get(int l, int r) {
    return get(r) - get(l - 1);
  }
};

int n;
long long H[N];
vector<long long> v;
fenwick_tree ft;
int l[N], r[N];

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> n;
  for (int i = 1; i <= n; i++) {
    cin >> H[i];
  }
  copy(H + 1, H + n + 1, back_inserter(v));
  sort(v.begin(), v.end());
  v.erase(unique(v.begin(), v.end()), v.end());
  for (int i = 1; i <= n; i++) {
    H[i] = lower_bound(v.begin(), v.end(), H[i]) - v.begin() + 1;
  }
  for (int i = 1; i <= n; i++) {
    l[i] = ft.get(H[i] - 1);
    ft.upd(H[i], +1);
  }
  memset(ft.f, 0, sizeof(ft.f));
  for (int i = n; i >= 1; i--) {
    r[i] = ft.get(H[i] - 1);
    ft.upd(H[i], +1);
  }
  long long ans = 0;
  for (int i = 1; i <= n; i++) {
    ans += 1LL * l[i] * r[i];
  }
  cout << ans << '\n';
  return 0;
}

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1624 KB Output is correct
2 Correct 66 ms 14280 KB Output is correct
3 Correct 61 ms 14216 KB Output is correct
4 Correct 58 ms 14272 KB Output is correct
5 Correct 65 ms 14276 KB Output is correct
6 Correct 59 ms 14268 KB Output is correct
7 Correct 60 ms 14272 KB Output is correct
8 Correct 60 ms 14272 KB Output is correct
9 Correct 61 ms 14280 KB Output is correct
10 Correct 67 ms 14360 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 9160 KB Output is correct
2 Correct 40 ms 9256 KB Output is correct
3 Correct 40 ms 9296 KB Output is correct
4 Correct 41 ms 9236 KB Output is correct
5 Correct 42 ms 9356 KB Output is correct
6 Correct 39 ms 9372 KB Output is correct
7 Correct 41 ms 9152 KB Output is correct
8 Correct 36 ms 9160 KB Output is correct
9 Correct 38 ms 9384 KB Output is correct
10 Correct 1 ms 1628 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 9160 KB Output is correct
2 Correct 40 ms 9256 KB Output is correct
3 Correct 40 ms 9296 KB Output is correct
4 Correct 41 ms 9236 KB Output is correct
5 Correct 42 ms 9356 KB Output is correct
6 Correct 39 ms 9372 KB Output is correct
7 Correct 41 ms 9152 KB Output is correct
8 Correct 36 ms 9160 KB Output is correct
9 Correct 38 ms 9384 KB Output is correct
10 Correct 1 ms 1628 KB Output is correct
11 Correct 48 ms 9408 KB Output is correct
12 Correct 49 ms 9412 KB Output is correct
13 Correct 49 ms 9424 KB Output is correct
14 Correct 48 ms 9408 KB Output is correct
15 Correct 48 ms 9516 KB Output is correct
16 Correct 49 ms 9416 KB Output is correct
17 Correct 47 ms 9404 KB Output is correct
18 Correct 33 ms 9412 KB Output is correct
19 Correct 36 ms 9412 KB Output is correct
20 Correct 1 ms 1628 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1624 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 1 ms 1628 KB Output is correct
6 Correct 1 ms 1628 KB Output is correct
7 Correct 1 ms 1628 KB Output is correct
8 Correct 1 ms 1628 KB Output is correct
9 Correct 1 ms 1880 KB Output is correct
10 Correct 1 ms 1624 KB Output is correct

Subtask #5
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1624 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 1 ms 1628 KB Output is correct
6 Correct 1 ms 1628 KB Output is correct
7 Correct 1 ms 1628 KB Output is correct
8 Correct 1 ms 1628 KB Output is correct
9 Correct 1 ms 1880 KB Output is correct
10 Correct 1 ms 1624 KB Output is correct
11 Correct 4 ms 2140 KB Output is correct
12 Correct 4 ms 2140 KB Output is correct
13 Correct 5 ms 2396 KB Output is correct
14 Correct 4 ms 2120 KB Output is correct
15 Correct 4 ms 2140 KB Output is correct
16 Correct 4 ms 2140 KB Output is correct
17 Correct 4 ms 2148 KB Output is correct
18 Correct 4 ms 2140 KB Output is correct
19 Correct 2 ms 1908 KB Output is correct
20 Correct 1 ms 1640 KB Output is correct

Subtask #6
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 9160 KB Output is correct
2 Correct 40 ms 9256 KB Output is correct
3 Correct 40 ms 9296 KB Output is correct
4 Correct 41 ms 9236 KB Output is correct
5 Correct 42 ms 9356 KB Output is correct
6 Correct 39 ms 9372 KB Output is correct
7 Correct 41 ms 9152 KB Output is correct
8 Correct 36 ms 9160 KB Output is correct
9 Correct 38 ms 9384 KB Output is correct
10 Correct 1 ms 1628 KB Output is correct
11 Correct 48 ms 9408 KB Output is correct
12 Correct 49 ms 9412 KB Output is correct
13 Correct 49 ms 9424 KB Output is correct
14 Correct 48 ms 9408 KB Output is correct
15 Correct 48 ms 9516 KB Output is correct
16 Correct 49 ms 9416 KB Output is correct
17 Correct 47 ms 9404 KB Output is correct
18 Correct 33 ms 9412 KB Output is correct
19 Correct 36 ms 9412 KB Output is correct
20 Correct 1 ms 1628 KB Output is correct
21 Correct 92 ms 10508 KB Output is correct
22 Correct 91 ms 10432 KB Output is correct
23 Correct 90 ms 10428 KB Output is correct
24 Correct 105 ms 10428 KB Output is correct
25 Correct 92 ms 10288 KB Output is correct
26 Correct 85 ms 10432 KB Output is correct
27 Correct 83 ms 10428 KB Output is correct
28 Correct 42 ms 10488 KB Output is correct
29 Correct 41 ms 10440 KB Output is correct
30 Correct 1 ms 1628 KB Output is correct

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1624 KB Output is correct
2 Correct 66 ms 14280 KB Output is correct
3 Correct 61 ms 14216 KB Output is correct
4 Correct 58 ms 14272 KB Output is correct
5 Correct 65 ms 14276 KB Output is correct
6 Correct 59 ms 14268 KB Output is correct
7 Correct 60 ms 14272 KB Output is correct
8 Correct 60 ms 14272 KB Output is correct
9 Correct 61 ms 14280 KB Output is correct
10 Correct 67 ms 14360 KB Output is correct
11 Correct 40 ms 9160 KB Output is correct
12 Correct 40 ms 9256 KB Output is correct
13 Correct 40 ms 9296 KB Output is correct
14 Correct 41 ms 9236 KB Output is correct
15 Correct 42 ms 9356 KB Output is correct
16 Correct 39 ms 9372 KB Output is correct
17 Correct 41 ms 9152 KB Output is correct
18 Correct 36 ms 9160 KB Output is correct
19 Correct 38 ms 9384 KB Output is correct
20 Correct 1 ms 1628 KB Output is correct
21 Correct 48 ms 9408 KB Output is correct
22 Correct 49 ms 9412 KB Output is correct
23 Correct 49 ms 9424 KB Output is correct
24 Correct 48 ms 9408 KB Output is correct
25 Correct 48 ms 9516 KB Output is correct
26 Correct 49 ms 9416 KB Output is correct
27 Correct 47 ms 9404 KB Output is correct
28 Correct 33 ms 9412 KB Output is correct
29 Correct 36 ms 9412 KB Output is correct
30 Correct 1 ms 1628 KB Output is correct
31 Correct 1 ms 1624 KB Output is correct
32 Correct 1 ms 1628 KB Output is correct
33 Correct 1 ms 1628 KB Output is correct
34 Correct 1 ms 1628 KB Output is correct
35 Correct 1 ms 1628 KB Output is correct
36 Correct 1 ms 1628 KB Output is correct
37 Correct 1 ms 1628 KB Output is correct
38 Correct 1 ms 1628 KB Output is correct
39 Correct 1 ms 1880 KB Output is correct
40 Correct 1 ms 1624 KB Output is correct
41 Correct 4 ms 2140 KB Output is correct
42 Correct 4 ms 2140 KB Output is correct
43 Correct 5 ms 2396 KB Output is correct
44 Correct 4 ms 2120 KB Output is correct
45 Correct 4 ms 2140 KB Output is correct
46 Correct 4 ms 2140 KB Output is correct
47 Correct 4 ms 2148 KB Output is correct
48 Correct 4 ms 2140 KB Output is correct
49 Correct 2 ms 1908 KB Output is correct
50 Correct 1 ms 1640 KB Output is correct
51 Correct 92 ms 10508 KB Output is correct
52 Correct 91 ms 10432 KB Output is correct
53 Correct 90 ms 10428 KB Output is correct
54 Correct 105 ms 10428 KB Output is correct
55 Correct 92 ms 10288 KB Output is correct
56 Correct 85 ms 10432 KB Output is correct
57 Correct 83 ms 10428 KB Output is correct
58 Correct 42 ms 10488 KB Output is correct
59 Correct 41 ms 10440 KB Output is correct
60 Correct 1 ms 1628 KB Output is correct
61 Correct 107 ms 14272 KB Output is correct
62 Correct 121 ms 14160 KB Output is correct
63 Correct 117 ms 14268 KB Output is correct
64 Correct 121 ms 14272 KB Output is correct
65 Correct 115 ms 14272 KB Output is correct
66 Correct 111 ms 14308 KB Output is correct
67 Correct 110 ms 14148 KB Output is correct
68 Correct 105 ms 14272 KB Output is correct
69 Correct 92 ms 10432 KB Output is correct
70 Correct 1 ms 1628 KB Output is correct