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Submission #347710

# Submission time Handle Problem Language Result Execution time Memory
347710 2021-01-13T10:36:17 Z Pety Mountains (NOI20_mountains) C++14
100 / 100
 341 ms 14188 KB 
#include <bits/stdc++.h>

using namespace std;

const int N= 3e5 + 2;
int n, aib[N], st[N], dr[N];
long long a[N], b[N];

void norm () {
  for (int i = 1; i <= n; i++)
    b[i] = a[i];
  sort(b + 1, b + n + 1);
  for (int i = 1; i <= n; i++)
    a[i] = lower_bound(b + 1, b + n + 1, a[i]) - b;
}

int query (int x) {
  int s = 0;
  for (int i = x; i; i -= (i & -i))
    s += aib[i];
  return s;
}

void update (int x) {
  for (int i = x; i <= n; i += (i & -i))
    aib[i] += 1;
}

int main ()
{
  cin >> n;
  for (int i = 1; i <= n; i++)
    cin >> a[i];
  norm();
  for (int i = 1; i <= n; i++) {
    st[i] = query(a[i] - 1);
    update(a[i]);
  }
  long long ans = 0;
  memset(aib, 0, sizeof(aib));
  for (int i = n; i >= 1; i--) {
    dr[i] = query(a[i]  -1);
    update(a[i]);
    ans += 1ll * st[i] * dr[i];
  }
  cout << ans;
  return 0;
}

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1516 KB Output is correct
2 Correct 252 ms 14060 KB Output is correct
3 Correct 252 ms 14152 KB Output is correct
4 Correct 300 ms 14060 KB Output is correct
5 Correct 255 ms 14060 KB Output is correct
6 Correct 253 ms 14060 KB Output is correct
7 Correct 253 ms 14188 KB Output is correct
8 Correct 250 ms 14060 KB Output is correct
9 Correct 250 ms 14060 KB Output is correct
10 Correct 250 ms 14060 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 8584 KB Output is correct
2 Correct 92 ms 8532 KB Output is correct
3 Correct 93 ms 8556 KB Output is correct
4 Correct 94 ms 8660 KB Output is correct
5 Correct 98 ms 8532 KB Output is correct
6 Correct 100 ms 8556 KB Output is correct
7 Correct 92 ms 8684 KB Output is correct
8 Correct 87 ms 8556 KB Output is correct
9 Correct 90 ms 8556 KB Output is correct
10 Correct 1 ms 1516 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 8584 KB Output is correct
2 Correct 92 ms 8532 KB Output is correct
3 Correct 93 ms 8556 KB Output is correct
4 Correct 94 ms 8660 KB Output is correct
5 Correct 98 ms 8532 KB Output is correct
6 Correct 100 ms 8556 KB Output is correct
7 Correct 92 ms 8684 KB Output is correct
8 Correct 87 ms 8556 KB Output is correct
9 Correct 90 ms 8556 KB Output is correct
10 Correct 1 ms 1516 KB Output is correct
11 Correct 128 ms 8556 KB Output is correct
12 Correct 128 ms 8556 KB Output is correct
13 Correct 135 ms 8556 KB Output is correct
14 Correct 130 ms 8684 KB Output is correct
15 Correct 128 ms 8556 KB Output is correct
16 Correct 128 ms 8556 KB Output is correct
17 Correct 130 ms 8556 KB Output is correct
18 Correct 88 ms 8556 KB Output is correct
19 Correct 88 ms 8556 KB Output is correct
20 Correct 1 ms 1516 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1516 KB Output is correct
2 Correct 2 ms 1516 KB Output is correct
3 Correct 2 ms 1516 KB Output is correct
4 Correct 2 ms 1516 KB Output is correct
5 Correct 2 ms 1516 KB Output is correct
6 Correct 2 ms 1516 KB Output is correct
7 Correct 2 ms 1516 KB Output is correct
8 Correct 2 ms 1516 KB Output is correct
9 Correct 1 ms 1516 KB Output is correct
10 Correct 1 ms 1516 KB Output is correct

Subtask #5
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1516 KB Output is correct
2 Correct 2 ms 1516 KB Output is correct
3 Correct 2 ms 1516 KB Output is correct
4 Correct 2 ms 1516 KB Output is correct
5 Correct 2 ms 1516 KB Output is correct
6 Correct 2 ms 1516 KB Output is correct
7 Correct 2 ms 1516 KB Output is correct
8 Correct 2 ms 1516 KB Output is correct
9 Correct 1 ms 1516 KB Output is correct
10 Correct 1 ms 1516 KB Output is correct
11 Correct 10 ms 1900 KB Output is correct
12 Correct 10 ms 1900 KB Output is correct
13 Correct 10 ms 1900 KB Output is correct
14 Correct 10 ms 1900 KB Output is correct
15 Correct 12 ms 1900 KB Output is correct
16 Correct 10 ms 1900 KB Output is correct
17 Correct 11 ms 1900 KB Output is correct
18 Correct 11 ms 1900 KB Output is correct
19 Correct 5 ms 1772 KB Output is correct
20 Correct 1 ms 1516 KB Output is correct

Subtask #6
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 8584 KB Output is correct
2 Correct 92 ms 8532 KB Output is correct
3 Correct 93 ms 8556 KB Output is correct
4 Correct 94 ms 8660 KB Output is correct
5 Correct 98 ms 8532 KB Output is correct
6 Correct 100 ms 8556 KB Output is correct
7 Correct 92 ms 8684 KB Output is correct
8 Correct 87 ms 8556 KB Output is correct
9 Correct 90 ms 8556 KB Output is correct
10 Correct 1 ms 1516 KB Output is correct
11 Correct 128 ms 8556 KB Output is correct
12 Correct 128 ms 8556 KB Output is correct
13 Correct 135 ms 8556 KB Output is correct
14 Correct 130 ms 8684 KB Output is correct
15 Correct 128 ms 8556 KB Output is correct
16 Correct 128 ms 8556 KB Output is correct
17 Correct 130 ms 8556 KB Output is correct
18 Correct 88 ms 8556 KB Output is correct
19 Correct 88 ms 8556 KB Output is correct
20 Correct 1 ms 1516 KB Output is correct
21 Correct 191 ms 8556 KB Output is correct
22 Correct 194 ms 8584 KB Output is correct
23 Correct 190 ms 8556 KB Output is correct
24 Correct 193 ms 8532 KB Output is correct
25 Correct 197 ms 8684 KB Output is correct
26 Correct 192 ms 8556 KB Output is correct
27 Correct 192 ms 8556 KB Output is correct
28 Correct 131 ms 8724 KB Output is correct
29 Correct 129 ms 8556 KB Output is correct
30 Correct 1 ms 1516 KB Output is correct

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1516 KB Output is correct
2 Correct 252 ms 14060 KB Output is correct
3 Correct 252 ms 14152 KB Output is correct
4 Correct 300 ms 14060 KB Output is correct
5 Correct 255 ms 14060 KB Output is correct
6 Correct 253 ms 14060 KB Output is correct
7 Correct 253 ms 14188 KB Output is correct
8 Correct 250 ms 14060 KB Output is correct
9 Correct 250 ms 14060 KB Output is correct
10 Correct 250 ms 14060 KB Output is correct
11 Correct 108 ms 8584 KB Output is correct
12 Correct 92 ms 8532 KB Output is correct
13 Correct 93 ms 8556 KB Output is correct
14 Correct 94 ms 8660 KB Output is correct
15 Correct 98 ms 8532 KB Output is correct
16 Correct 100 ms 8556 KB Output is correct
17 Correct 92 ms 8684 KB Output is correct
18 Correct 87 ms 8556 KB Output is correct
19 Correct 90 ms 8556 KB Output is correct
20 Correct 1 ms 1516 KB Output is correct
21 Correct 128 ms 8556 KB Output is correct
22 Correct 128 ms 8556 KB Output is correct
23 Correct 135 ms 8556 KB Output is correct
24 Correct 130 ms 8684 KB Output is correct
25 Correct 128 ms 8556 KB Output is correct
26 Correct 128 ms 8556 KB Output is correct
27 Correct 130 ms 8556 KB Output is correct
28 Correct 88 ms 8556 KB Output is correct
29 Correct 88 ms 8556 KB Output is correct
30 Correct 1 ms 1516 KB Output is correct
31 Correct 2 ms 1516 KB Output is correct
32 Correct 2 ms 1516 KB Output is correct
33 Correct 2 ms 1516 KB Output is correct
34 Correct 2 ms 1516 KB Output is correct
35 Correct 2 ms 1516 KB Output is correct
36 Correct 2 ms 1516 KB Output is correct
37 Correct 2 ms 1516 KB Output is correct
38 Correct 2 ms 1516 KB Output is correct
39 Correct 1 ms 1516 KB Output is correct
40 Correct 1 ms 1516 KB Output is correct
41 Correct 10 ms 1900 KB Output is correct
42 Correct 10 ms 1900 KB Output is correct
43 Correct 10 ms 1900 KB Output is correct
44 Correct 10 ms 1900 KB Output is correct
45 Correct 12 ms 1900 KB Output is correct
46 Correct 10 ms 1900 KB Output is correct
47 Correct 11 ms 1900 KB Output is correct
48 Correct 11 ms 1900 KB Output is correct
49 Correct 5 ms 1772 KB Output is correct
50 Correct 1 ms 1516 KB Output is correct
51 Correct 191 ms 8556 KB Output is correct
52 Correct 194 ms 8584 KB Output is correct
53 Correct 190 ms 8556 KB Output is correct
54 Correct 193 ms 8532 KB Output is correct
55 Correct 197 ms 8684 KB Output is correct
56 Correct 192 ms 8556 KB Output is correct
57 Correct 192 ms 8556 KB Output is correct
58 Correct 131 ms 8724 KB Output is correct
59 Correct 129 ms 8556 KB Output is correct
60 Correct 1 ms 1516 KB Output is correct
61 Correct 328 ms 14060 KB Output is correct
62 Correct 318 ms 14068 KB Output is correct
63 Correct 317 ms 14188 KB Output is correct
64 Correct 341 ms 14064 KB Output is correct
65 Correct 328 ms 14188 KB Output is correct
66 Correct 321 ms 14060 KB Output is correct
67 Correct 315 ms 14060 KB Output is correct
68 Correct 322 ms 14188 KB Output is correct
69 Correct 196 ms 10476 KB Output is correct
70 Correct 1 ms 1516 KB Output is correct