Submission #784775

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
784775	2023-07-16T13:56:14 Z	borisAngelov	Group Photo (JOI21_ho_t3)	C++17	100 / 100	348 ms	588 KB

Main

#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;
}

int tree[maxn];

void reset_tree()
{
    for (int i = 1; i <= n; ++i)
    {
        tree[i] = 0;
    }
}

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

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

    for (int i = idx; i >= 1; i -= (i & (-i)))
    {
        result += tree[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);
        reset_tree();

        dp[i] = 1e9;

        int cost = 0;

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

            update_tree(pos[j], +1);

            cost -= (query_tree(n) - query_tree(pos[j]));

            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	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct

Subtask #2
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	0 ms	340 KB	Output is correct
15	Correct	1 ms	256 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	0 ms	340 KB	Output is correct
19	Correct	0 ms	340 KB	Output is correct
20	Correct	0 ms	340 KB	Output is correct

Subtask #3
32.0 / 32.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	0 ms	340 KB	Output is correct
15	Correct	1 ms	256 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	0 ms	340 KB	Output is correct
19	Correct	0 ms	340 KB	Output is correct
20	Correct	0 ms	340 KB	Output is correct
21	Correct	1 ms	340 KB	Output is correct
22	Correct	1 ms	340 KB	Output is correct
23	Correct	1 ms	340 KB	Output is correct
24	Correct	1 ms	340 KB	Output is correct
25	Correct	1 ms	340 KB	Output is correct
26	Correct	1 ms	340 KB	Output is correct
27	Correct	1 ms	340 KB	Output is correct
28	Correct	1 ms	340 KB	Output is correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	1 ms	340 KB	Output is correct

Subtask #4
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	0 ms	340 KB	Output is correct
15	Correct	1 ms	256 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	0 ms	340 KB	Output is correct
19	Correct	0 ms	340 KB	Output is correct
20	Correct	0 ms	340 KB	Output is correct
21	Correct	1 ms	340 KB	Output is correct
22	Correct	1 ms	340 KB	Output is correct
23	Correct	1 ms	340 KB	Output is correct
24	Correct	1 ms	340 KB	Output is correct
25	Correct	1 ms	340 KB	Output is correct
26	Correct	1 ms	340 KB	Output is correct
27	Correct	1 ms	340 KB	Output is correct
28	Correct	1 ms	340 KB	Output is correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	1 ms	340 KB	Output is correct
31	Correct	5 ms	340 KB	Output is correct
32	Correct	5 ms	340 KB	Output is correct
33	Correct	5 ms	340 KB	Output is correct
34	Correct	4 ms	340 KB	Output is correct
35	Correct	4 ms	340 KB	Output is correct
36	Correct	4 ms	340 KB	Output is correct
37	Correct	4 ms	340 KB	Output is correct
38	Correct	4 ms	340 KB	Output is correct
39	Correct	4 ms	340 KB	Output is correct
40	Correct	4 ms	340 KB	Output is correct

Subtask #5
36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	0 ms	340 KB	Output is correct
15	Correct	1 ms	256 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	0 ms	340 KB	Output is correct
19	Correct	0 ms	340 KB	Output is correct
20	Correct	0 ms	340 KB	Output is correct
21	Correct	1 ms	340 KB	Output is correct
22	Correct	1 ms	340 KB	Output is correct
23	Correct	1 ms	340 KB	Output is correct
24	Correct	1 ms	340 KB	Output is correct
25	Correct	1 ms	340 KB	Output is correct
26	Correct	1 ms	340 KB	Output is correct
27	Correct	1 ms	340 KB	Output is correct
28	Correct	1 ms	340 KB	Output is correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	1 ms	340 KB	Output is correct
31	Correct	5 ms	340 KB	Output is correct
32	Correct	5 ms	340 KB	Output is correct
33	Correct	5 ms	340 KB	Output is correct
34	Correct	4 ms	340 KB	Output is correct
35	Correct	4 ms	340 KB	Output is correct
36	Correct	4 ms	340 KB	Output is correct
37	Correct	4 ms	340 KB	Output is correct
38	Correct	4 ms	340 KB	Output is correct
39	Correct	4 ms	340 KB	Output is correct
40	Correct	4 ms	340 KB	Output is correct
41	Correct	340 ms	392 KB	Output is correct
42	Correct	343 ms	588 KB	Output is correct
43	Correct	338 ms	340 KB	Output is correct
44	Correct	348 ms	432 KB	Output is correct
45	Correct	336 ms	436 KB	Output is correct
46	Correct	332 ms	428 KB	Output is correct
47	Correct	326 ms	416 KB	Output is correct
48	Correct	325 ms	340 KB	Output is correct
49	Correct	329 ms	340 KB	Output is correct
50	Correct	325 ms	412 KB	Output is correct
51	Correct	332 ms	420 KB	Output is correct
52	Correct	329 ms	428 KB	Output is correct
53	Correct	337 ms	424 KB	Output is correct
54	Correct	331 ms	424 KB	Output is correct
55	Correct	332 ms	432 KB	Output is correct

Submission #784775

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 7.0 / 7.0

Subtask #3 32.0 / 32.0

Subtask #4 20.0 / 20.0

Subtask #5 36.0 / 36.0

Subtask #1
5.0 / 5.0

Subtask #2
7.0 / 7.0

Subtask #3
32.0 / 32.0

Subtask #4
20.0 / 20.0

Subtask #5
36.0 / 36.0