oj.uz

Submission #894212

# Submission time Handle Problem Language Result Execution time Memory
894212 2023-12-28T02:55:56 Z box Group Photo (JOI21_ho_t3) C++17
100 / 100
 209 ms 98472 KB 
#include <iostream>
using namespace std;
 
const int N = 5e3;
 
int main() {
  int n;
  scanf("%d", &n);
  static int o[N + 1];
  for (int i = 1; i <= n; i++) {
    int a;
    scanf("%d", &a);
    o[a] = i;
  }
  static int s[N + 1][N + 1];
  for (int i = 1; i <= n; i++)
    for (int j = 1; j <= n; j++)
      s[i][j] =
          s[i - 1][j] + s[i][j - 1] - s[i - 1][j - 1] + (i < j && o[i] > o[j]);
  auto inv = [&](int i1, int i2, int j1, int j2) {
    return s[i2][j2] - s[i1 - 1][j2] - s[i2][j1 - 1] + s[i1 - 1][j1 - 1];
  };
  auto ninv = [&](int i, int j) {
    return (j - i + 1) * (j - i) / 2 - inv(i, j, i, j);
  };
  static int f[N + 1];
  for (int i = 1; i <= n; i++) {
    f[i] = ninv(1, i);
    for (int j = 1; j < i; j++)
      f[i] = min(f[i], f[j] + inv(1, j, j + 1, i) + ninv(j + 1, i));
  }
  printf("%d\n", f[n]);
  return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:8:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |   scanf("%d", &n);
      |   ~~~~~^~~~~~~~~~
Main.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     scanf("%d", &a);
      |     ~~~~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 448 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 448 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 448 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 1372 KB Output is correct
22 Correct 2 ms 1372 KB Output is correct
23 Correct 1 ms 1372 KB Output is correct
24 Correct 1 ms 1368 KB Output is correct
25 Correct 1 ms 1372 KB Output is correct
26 Correct 1 ms 1372 KB Output is correct
27 Correct 2 ms 1372 KB Output is correct
28 Correct 1 ms 1368 KB Output is correct
29 Correct 1 ms 1372 KB Output is correct
30 Correct 1 ms 1372 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 448 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 1372 KB Output is correct
22 Correct 2 ms 1372 KB Output is correct
23 Correct 1 ms 1372 KB Output is correct
24 Correct 1 ms 1368 KB Output is correct
25 Correct 1 ms 1372 KB Output is correct
26 Correct 1 ms 1372 KB Output is correct
27 Correct 2 ms 1372 KB Output is correct
28 Correct 1 ms 1368 KB Output is correct
29 Correct 1 ms 1372 KB Output is correct
30 Correct 1 ms 1372 KB Output is correct
31 Correct 6 ms 7260 KB Output is correct
32 Correct 6 ms 7260 KB Output is correct
33 Correct 6 ms 7256 KB Output is correct
34 Correct 8 ms 7256 KB Output is correct
35 Correct 6 ms 7260 KB Output is correct
36 Correct 6 ms 7372 KB Output is correct
37 Correct 8 ms 7256 KB Output is correct
38 Correct 7 ms 7296 KB Output is correct
39 Correct 6 ms 7256 KB Output is correct
40 Correct 8 ms 7260 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 448 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 1372 KB Output is correct
22 Correct 2 ms 1372 KB Output is correct
23 Correct 1 ms 1372 KB Output is correct
24 Correct 1 ms 1368 KB Output is correct
25 Correct 1 ms 1372 KB Output is correct
26 Correct 1 ms 1372 KB Output is correct
27 Correct 2 ms 1372 KB Output is correct
28 Correct 1 ms 1368 KB Output is correct
29 Correct 1 ms 1372 KB Output is correct
30 Correct 1 ms 1372 KB Output is correct
31 Correct 6 ms 7260 KB Output is correct
32 Correct 6 ms 7260 KB Output is correct
33 Correct 6 ms 7256 KB Output is correct
34 Correct 8 ms 7256 KB Output is correct
35 Correct 6 ms 7260 KB Output is correct
36 Correct 6 ms 7372 KB Output is correct
37 Correct 8 ms 7256 KB Output is correct
38 Correct 7 ms 7296 KB Output is correct
39 Correct 6 ms 7256 KB Output is correct
40 Correct 8 ms 7260 KB Output is correct
41 Correct 184 ms 98284 KB Output is correct
42 Correct 166 ms 98132 KB Output is correct
43 Correct 179 ms 98472 KB Output is correct
44 Correct 171 ms 98324 KB Output is correct
45 Correct 203 ms 98132 KB Output is correct
46 Correct 174 ms 98280 KB Output is correct
47 Correct 193 ms 98344 KB Output is correct
48 Correct 167 ms 98320 KB Output is correct
49 Correct 180 ms 98244 KB Output is correct
50 Correct 167 ms 98344 KB Output is correct
51 Correct 178 ms 98332 KB Output is correct
52 Correct 171 ms 98292 KB Output is correct
53 Correct 170 ms 98344 KB Output is correct
54 Correct 171 ms 98200 KB Output is correct
55 Correct 209 ms 98220 KB Output is correct