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Submission #784773

# Submission time Handle Problem Language Result Execution time Memory
784773 2023-07-16T13:52:35 Z borisAngelov Group Photo (JOI21_ho_t3) C++17
64 / 100
 5000 ms 452 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 5005;
const int inf = 1e9;

int n;

int p[maxn];
int pos[maxn];

int dp[maxn];

int tree_original[maxn];

void update_original(int idx, int val)
{
    for (int i = idx; i <= n; i += (i & (-i)))
    {
        tree_original[i] += val;
    }
}

int query_original(int idx)
{
    int result = 0;

    for (int i = idx; i >= 1; i -= (i & (-i)))
    {
        result += tree_original[i];
    }

    return result;
}

void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}

int main()
{
    fastIO();

    cin >> n;

    for (int i = 1; i <= n; ++i)
    {
        cin >> p[i];
        pos[p[i]] = i;
    }

    dp[n + 1] = 0;

    for (int i = n; i >= 1; --i)
    {
        update_original(pos[i], +1);

        dp[i] = 1e9;

        int cost = 0;

        for (int j = i; j <= n; ++j)
        {
            cost += query_original(pos[j]) - 1;

            for (int k = 1; k <= n; ++k)
            {
                if (pos[k] > pos[j] && k >= i && k <= j)
                {
                    --cost;
                }
            }

            dp[i] = min(dp[i], dp[j + 1] + cost);
        }
    }

    cout << dp[1] << endl;

    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 7 ms 340 KB Output is correct
22 Correct 7 ms 336 KB Output is correct
23 Correct 7 ms 340 KB Output is correct
24 Correct 8 ms 340 KB Output is correct
25 Correct 8 ms 340 KB Output is correct
26 Correct 8 ms 340 KB Output is correct
27 Correct 8 ms 344 KB Output is correct
28 Correct 9 ms 336 KB Output is correct
29 Correct 7 ms 324 KB Output is correct
30 Correct 8 ms 340 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 7 ms 340 KB Output is correct
22 Correct 7 ms 336 KB Output is correct
23 Correct 7 ms 340 KB Output is correct
24 Correct 8 ms 340 KB Output is correct
25 Correct 8 ms 340 KB Output is correct
26 Correct 8 ms 340 KB Output is correct
27 Correct 8 ms 344 KB Output is correct
28 Correct 9 ms 336 KB Output is correct
29 Correct 7 ms 324 KB Output is correct
30 Correct 8 ms 340 KB Output is correct
31 Correct 580 ms 340 KB Output is correct
32 Correct 579 ms 340 KB Output is correct
33 Correct 579 ms 340 KB Output is correct
34 Correct 588 ms 340 KB Output is correct
35 Correct 580 ms 340 KB Output is correct
36 Correct 595 ms 340 KB Output is correct
37 Correct 570 ms 340 KB Output is correct
38 Correct 596 ms 452 KB Output is correct
39 Correct 609 ms 340 KB Output is correct
40 Correct 594 ms 340 KB Output is correct

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 7 ms 340 KB Output is correct
22 Correct 7 ms 336 KB Output is correct
23 Correct 7 ms 340 KB Output is correct
24 Correct 8 ms 340 KB Output is correct
25 Correct 8 ms 340 KB Output is correct
26 Correct 8 ms 340 KB Output is correct
27 Correct 8 ms 344 KB Output is correct
28 Correct 9 ms 336 KB Output is correct
29 Correct 7 ms 324 KB Output is correct
30 Correct 8 ms 340 KB Output is correct
31 Correct 580 ms 340 KB Output is correct
32 Correct 579 ms 340 KB Output is correct
33 Correct 579 ms 340 KB Output is correct
34 Correct 588 ms 340 KB Output is correct
35 Correct 580 ms 340 KB Output is correct
36 Correct 595 ms 340 KB Output is correct
37 Correct 570 ms 340 KB Output is correct
38 Correct 596 ms 452 KB Output is correct
39 Correct 609 ms 340 KB Output is correct
40 Correct 594 ms 340 KB Output is correct
41 Execution timed out 5063 ms 388 KB Time limit exceeded
42 Halted 0 ms 0 KB -