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Submission #224574

# Submission time Handle Problem Language Result Execution time Memory
224574 2020-04-18T12:44:02 Z Haunted_Cpp Mountains (NOI20_mountains) C++17
100 / 100
 213 ms 7548 KB 
#include <iostream>
#include <vector>
#include <algorithm>
 
typedef long long i64;
using namespace std;
 
const int N = 3e5 + 5;
 
i64 a [N];

struct FenwickTree {
  vector<int> bit;
  const int N;
  FenwickTree (int n) : N (n + 5) {
    bit.clear(); bit.resize(N);
  }
  void update (int idx, int delta) {
    for (; idx < N; idx += idx & (- idx)) {
      bit[idx] += delta;
    }
  }
  int query (int idx) {
    int res = 0;
    for (; idx > 0; idx -= idx & (- idx)) {
      res += bit[idx];
    }
    return res;
  }
  int range_sum (int lo, int hi) {
    return query (hi) - query (lo -1);
  }
};


int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  vector<i64> comp;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    comp.emplace_back(a[i]);
  }
  sort (comp.begin(), comp.end());
  comp.erase(unique(comp.begin(), comp.end()), comp.end());
  FenwickTree menor (n), maior (n);
  for (int i = 0; i < n; i++) {
    a[i] = (lower_bound (comp.begin(), comp.end(), a[i]) - comp.begin() + 1);
    maior.update(a[i], +1);
  }
  i64 res = 0;
  for (int i = 0; i < n; i++) {
    maior.update(a[i], -1);
    res += 1LL * menor.range_sum (0, a[i] - 1) * maior.range_sum (0, a[i] - 1);
    menor.update(a[i], +1);
  }
  cout << res << '\n';
  return 0;
}

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 118 ms 7396 KB Output is correct
3 Correct 125 ms 7548 KB Output is correct
4 Correct 115 ms 7400 KB Output is correct
5 Correct 116 ms 7396 KB Output is correct
6 Correct 118 ms 7396 KB Output is correct
7 Correct 117 ms 7396 KB Output is correct
8 Correct 117 ms 7396 KB Output is correct
9 Correct 114 ms 7396 KB Output is correct
10 Correct 113 ms 7396 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 7400 KB Output is correct
2 Correct 72 ms 7400 KB Output is correct
3 Correct 69 ms 7408 KB Output is correct
4 Correct 69 ms 7400 KB Output is correct
5 Correct 69 ms 7400 KB Output is correct
6 Correct 68 ms 7400 KB Output is correct
7 Correct 68 ms 7408 KB Output is correct
8 Correct 72 ms 7412 KB Output is correct
9 Correct 66 ms 7400 KB Output is correct
10 Correct 4 ms 384 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 7400 KB Output is correct
2 Correct 72 ms 7400 KB Output is correct
3 Correct 69 ms 7408 KB Output is correct
4 Correct 69 ms 7400 KB Output is correct
5 Correct 69 ms 7400 KB Output is correct
6 Correct 68 ms 7400 KB Output is correct
7 Correct 68 ms 7408 KB Output is correct
8 Correct 72 ms 7412 KB Output is correct
9 Correct 66 ms 7400 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 82 ms 7396 KB Output is correct
12 Correct 83 ms 7396 KB Output is correct
13 Correct 82 ms 7392 KB Output is correct
14 Correct 84 ms 7428 KB Output is correct
15 Correct 84 ms 7396 KB Output is correct
16 Correct 83 ms 7396 KB Output is correct
17 Correct 80 ms 7396 KB Output is correct
18 Correct 59 ms 7400 KB Output is correct
19 Correct 66 ms 7408 KB Output is correct
20 Correct 4 ms 384 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 288 KB Output is correct

Subtask #5
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 288 KB Output is correct
11 Correct 9 ms 640 KB Output is correct
12 Correct 9 ms 640 KB Output is correct
13 Correct 9 ms 640 KB Output is correct
14 Correct 10 ms 640 KB Output is correct
15 Correct 9 ms 640 KB Output is correct
16 Correct 9 ms 640 KB Output is correct
17 Correct 9 ms 640 KB Output is correct
18 Correct 9 ms 640 KB Output is correct
19 Correct 7 ms 640 KB Output is correct
20 Correct 4 ms 384 KB Output is correct

Subtask #6
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 7400 KB Output is correct
2 Correct 72 ms 7400 KB Output is correct
3 Correct 69 ms 7408 KB Output is correct
4 Correct 69 ms 7400 KB Output is correct
5 Correct 69 ms 7400 KB Output is correct
6 Correct 68 ms 7400 KB Output is correct
7 Correct 68 ms 7408 KB Output is correct
8 Correct 72 ms 7412 KB Output is correct
9 Correct 66 ms 7400 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 82 ms 7396 KB Output is correct
12 Correct 83 ms 7396 KB Output is correct
13 Correct 82 ms 7392 KB Output is correct
14 Correct 84 ms 7428 KB Output is correct
15 Correct 84 ms 7396 KB Output is correct
16 Correct 83 ms 7396 KB Output is correct
17 Correct 80 ms 7396 KB Output is correct
18 Correct 59 ms 7400 KB Output is correct
19 Correct 66 ms 7408 KB Output is correct
20 Correct 4 ms 384 KB Output is correct
21 Correct 140 ms 7432 KB Output is correct
22 Correct 137 ms 7396 KB Output is correct
23 Correct 135 ms 7396 KB Output is correct
24 Correct 140 ms 7404 KB Output is correct
25 Correct 138 ms 7392 KB Output is correct
26 Correct 138 ms 7392 KB Output is correct
27 Correct 139 ms 7392 KB Output is correct
28 Correct 83 ms 7396 KB Output is correct
29 Correct 89 ms 7532 KB Output is correct
30 Correct 4 ms 384 KB Output is correct

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 118 ms 7396 KB Output is correct
3 Correct 125 ms 7548 KB Output is correct
4 Correct 115 ms 7400 KB Output is correct
5 Correct 116 ms 7396 KB Output is correct
6 Correct 118 ms 7396 KB Output is correct
7 Correct 117 ms 7396 KB Output is correct
8 Correct 117 ms 7396 KB Output is correct
9 Correct 114 ms 7396 KB Output is correct
10 Correct 113 ms 7396 KB Output is correct
11 Correct 67 ms 7400 KB Output is correct
12 Correct 72 ms 7400 KB Output is correct
13 Correct 69 ms 7408 KB Output is correct
14 Correct 69 ms 7400 KB Output is correct
15 Correct 69 ms 7400 KB Output is correct
16 Correct 68 ms 7400 KB Output is correct
17 Correct 68 ms 7408 KB Output is correct
18 Correct 72 ms 7412 KB Output is correct
19 Correct 66 ms 7400 KB Output is correct
20 Correct 4 ms 384 KB Output is correct
21 Correct 82 ms 7396 KB Output is correct
22 Correct 83 ms 7396 KB Output is correct
23 Correct 82 ms 7392 KB Output is correct
24 Correct 84 ms 7428 KB Output is correct
25 Correct 84 ms 7396 KB Output is correct
26 Correct 83 ms 7396 KB Output is correct
27 Correct 80 ms 7396 KB Output is correct
28 Correct 59 ms 7400 KB Output is correct
29 Correct 66 ms 7408 KB Output is correct
30 Correct 4 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct
34 Correct 5 ms 384 KB Output is correct
35 Correct 5 ms 384 KB Output is correct
36 Correct 5 ms 384 KB Output is correct
37 Correct 5 ms 384 KB Output is correct
38 Correct 5 ms 384 KB Output is correct
39 Correct 5 ms 384 KB Output is correct
40 Correct 5 ms 288 KB Output is correct
41 Correct 9 ms 640 KB Output is correct
42 Correct 9 ms 640 KB Output is correct
43 Correct 9 ms 640 KB Output is correct
44 Correct 10 ms 640 KB Output is correct
45 Correct 9 ms 640 KB Output is correct
46 Correct 9 ms 640 KB Output is correct
47 Correct 9 ms 640 KB Output is correct
48 Correct 9 ms 640 KB Output is correct
49 Correct 7 ms 640 KB Output is correct
50 Correct 4 ms 384 KB Output is correct
51 Correct 140 ms 7432 KB Output is correct
52 Correct 137 ms 7396 KB Output is correct
53 Correct 135 ms 7396 KB Output is correct
54 Correct 140 ms 7404 KB Output is correct
55 Correct 138 ms 7392 KB Output is correct
56 Correct 138 ms 7392 KB Output is correct
57 Correct 139 ms 7392 KB Output is correct
58 Correct 83 ms 7396 KB Output is correct
59 Correct 89 ms 7532 KB Output is correct
60 Correct 4 ms 384 KB Output is correct
61 Correct 183 ms 7392 KB Output is correct
62 Correct 181 ms 7388 KB Output is correct
63 Correct 184 ms 7460 KB Output is correct
64 Correct 178 ms 7392 KB Output is correct
65 Correct 213 ms 7396 KB Output is correct
66 Correct 179 ms 7392 KB Output is correct
67 Correct 181 ms 7392 KB Output is correct
68 Correct 177 ms 7392 KB Output is correct
69 Correct 140 ms 7392 KB Output is correct
70 Correct 5 ms 384 KB Output is correct