Submission #685163

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
685163	2023-01-23T15:56:11 Z	ethening	Group Photo (JOI21_ho_t3)	C++17	100 / 100	772 ms	196896 KB

Main

#include "bits/stdc++.h"
#include <vector>
using namespace std;
using ll = long long;

const int INF = 1e9;

int n;
int a[5005];

vector<vector<int>> p1, p2;

void compute_p(vector<vector<int>>& p) {
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
			p[i][j] = p[i][j] + p[i][j - 1] + p[i - 1][j] - p[i - 1][j - 1];
		}
	}
}

int get_p(vector<vector<int>>& p, int l1, int r1, int l2, int r2) {
	return p[r1][r2] - p[l1 - 1][r2] - p[r1][l2 - 1] + p[l1 - 1][l2 - 1];
}

int main() {
	cin.tie(0)->sync_with_stdio(0);
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
	}

	p1 = vector<vector<int>>(n + 5, vector<int>(n + 5, 0));
	p2 = vector<vector<int>>(n + 5, vector<int>(n + 5, 0));

	vector<int> dp(n + 5, INF);

	for (int i = 1; i <= n; i++) {
		for (int j = i + 1; j <= n; j++) {
			if (a[i] > a[j]) {
				++p1[a[i]][a[j]];
			}
			else if (a[i] < a[j]) {
				++p2[a[i]][a[j]];
			}
		}
	}

	// for (int i = 1; i <= n; i++) {
	// 	for (int j = 1; j <= n; j++) {
	// 		cout << p1[i][j] << " \n"[j == n];
	// 	}
	// }

	// cout << "\n";
	// for (int i = 1; i <= n; i++) {
	// 	for (int j = 1; j <= n; j++) {
	// 		cout << p2[i][j] << " \n"[j == n];
	// 	}
	// }


	compute_p(p1);
	compute_p(p2);

	// cout << "===\n";
	// for (int i = 1; i <= n; i++) {
	// 	for (int j = 1; j <= n; j++) {
	// 		cout << p1[i][j] << " \n"[j == n];
	// 	}
	// }

	// cout << "\n";
	// for (int i = 1; i <= n; i++) {
	// 	for (int j = 1; j <= n; j++) {
	// 		cout << p2[i][j] << " \n"[j == n];
	// 	}
	// }

	dp[0] = 0;
	for (int i = 1; i <= n; i++) {
		{
			int cost2 = get_p(p2, 1, i, 1, i);
			dp[i] = min(dp[i], cost2);
		}
		for (int j = 1; j < i; j++) {
			int cost1 = get_p(p1, j + 1, i, 1, j);
			int cost2 = get_p(p2, j + 1, i, j + 1, i);
			dp[i] = min(dp[i], cost1 + cost2 + dp[j]);
		}
	}
	cout << dp[n] << "\n";
}

Subtask #1
5.0 / 5.0

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

Subtask #3
32.0 / 32.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	1 ms	596 KB	Output is correct
22	Correct	1 ms	596 KB	Output is correct
23	Correct	1 ms	596 KB	Output is correct
24	Correct	1 ms	596 KB	Output is correct
25	Correct	1 ms	596 KB	Output is correct
26	Correct	1 ms	596 KB	Output is correct
27	Correct	1 ms	596 KB	Output is correct
28	Correct	1 ms	596 KB	Output is correct
29	Correct	1 ms	596 KB	Output is correct
30	Correct	1 ms	596 KB	Output is correct

Subtask #4
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	1 ms	596 KB	Output is correct
22	Correct	1 ms	596 KB	Output is correct
23	Correct	1 ms	596 KB	Output is correct
24	Correct	1 ms	596 KB	Output is correct
25	Correct	1 ms	596 KB	Output is correct
26	Correct	1 ms	596 KB	Output is correct
27	Correct	1 ms	596 KB	Output is correct
28	Correct	1 ms	596 KB	Output is correct
29	Correct	1 ms	596 KB	Output is correct
30	Correct	1 ms	596 KB	Output is correct
31	Correct	10 ms	5332 KB	Output is correct
32	Correct	11 ms	5460 KB	Output is correct
33	Correct	10 ms	5460 KB	Output is correct
34	Correct	10 ms	5460 KB	Output is correct
35	Correct	10 ms	5448 KB	Output is correct
36	Correct	10 ms	5460 KB	Output is correct
37	Correct	10 ms	5448 KB	Output is correct
38	Correct	10 ms	5460 KB	Output is correct
39	Correct	10 ms	5460 KB	Output is correct
40	Correct	10 ms	5460 KB	Output is correct

Subtask #5
36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	1 ms	596 KB	Output is correct
22	Correct	1 ms	596 KB	Output is correct
23	Correct	1 ms	596 KB	Output is correct
24	Correct	1 ms	596 KB	Output is correct
25	Correct	1 ms	596 KB	Output is correct
26	Correct	1 ms	596 KB	Output is correct
27	Correct	1 ms	596 KB	Output is correct
28	Correct	1 ms	596 KB	Output is correct
29	Correct	1 ms	596 KB	Output is correct
30	Correct	1 ms	596 KB	Output is correct
31	Correct	10 ms	5332 KB	Output is correct
32	Correct	11 ms	5460 KB	Output is correct
33	Correct	10 ms	5460 KB	Output is correct
34	Correct	10 ms	5460 KB	Output is correct
35	Correct	10 ms	5448 KB	Output is correct
36	Correct	10 ms	5460 KB	Output is correct
37	Correct	10 ms	5448 KB	Output is correct
38	Correct	10 ms	5460 KB	Output is correct
39	Correct	10 ms	5460 KB	Output is correct
40	Correct	10 ms	5460 KB	Output is correct
41	Correct	638 ms	196580 KB	Output is correct
42	Correct	646 ms	196740 KB	Output is correct
43	Correct	654 ms	196812 KB	Output is correct
44	Correct	680 ms	196684 KB	Output is correct
45	Correct	700 ms	196768 KB	Output is correct
46	Correct	654 ms	196832 KB	Output is correct
47	Correct	654 ms	196868 KB	Output is correct
48	Correct	686 ms	196804 KB	Output is correct
49	Correct	733 ms	196804 KB	Output is correct
50	Correct	738 ms	196804 KB	Output is correct
51	Correct	726 ms	196808 KB	Output is correct
52	Correct	743 ms	196684 KB	Output is correct
53	Correct	772 ms	196808 KB	Output is correct
54	Correct	696 ms	196896 KB	Output is correct
55	Correct	732 ms	196804 KB	Output is correct

Submission #685163

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