Submission #771218

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
771218	2023-07-02T16:06:13 Z	Trisanu_Das	Group Photo (JOI21_ho_t3)	C++17	100 / 100	230 ms	67464 KB

Main

#include <bits/stdc++.h>
using namespace std;
 
int a[5005], pos[5005], dp[5005], ulta[5005][5005];
 
signed main(){
	int n; cin >> n;
	for(int i = 1; i < n + 1; i++){
		cin >> a[i];
		pos[a[i]] = i;
	}
	for(int i = 2; i < n + 1; i++){
		int cnt = 0;
		for(int j = i - 1; j > 0; j--){
			if(pos[j] > pos[i]) cnt++;
			ulta[j][i] = ulta[j][i - 1] + cnt;
		}
	}
	for(int i = 1; i < n + 1; i++){
		dp[i] = INT_MAX;
		for(int j = 0; j < i; j++){
			dp[i] = min(dp[i], dp[j] + ulta[1][i] - ulta[1][j] + ((i - j) * (i - j - 1)) / 2 - 2 * ulta[j + 1][i]);
		}
	}
	cout << dp[n] << '\n';
}

Subtask #1

5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	304 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	308 KB	Output is correct

Subtask #2

7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	304 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	308 KB	Output is correct
11	Correct	1 ms	340 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	304 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	1 ms	340 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct

Subtask #3

32.0 / 32.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	304 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	308 KB	Output is correct
11	Correct	1 ms	340 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	304 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	1 ms	340 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	1108 KB	Output is correct
22	Correct	1 ms	1108 KB	Output is correct
23	Correct	1 ms	1108 KB	Output is correct
24	Correct	1 ms	1108 KB	Output is correct
25	Correct	1 ms	1108 KB	Output is correct
26	Correct	1 ms	1108 KB	Output is correct
27	Correct	1 ms	1072 KB	Output is correct
28	Correct	1 ms	1108 KB	Output is correct
29	Correct	1 ms	1108 KB	Output is correct
30	Correct	1 ms	1076 KB	Output is correct

Subtask #4

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	304 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	308 KB	Output is correct
11	Correct	1 ms	340 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	304 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	1 ms	340 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	1108 KB	Output is correct
22	Correct	1 ms	1108 KB	Output is correct
23	Correct	1 ms	1108 KB	Output is correct
24	Correct	1 ms	1108 KB	Output is correct
25	Correct	1 ms	1108 KB	Output is correct
26	Correct	1 ms	1108 KB	Output is correct
27	Correct	1 ms	1072 KB	Output is correct
28	Correct	1 ms	1108 KB	Output is correct
29	Correct	1 ms	1108 KB	Output is correct
30	Correct	1 ms	1076 KB	Output is correct
31	Correct	4 ms	4692 KB	Output is correct
32	Correct	5 ms	4692 KB	Output is correct
33	Correct	4 ms	4692 KB	Output is correct
34	Correct	4 ms	4788 KB	Output is correct
35	Correct	4 ms	4788 KB	Output is correct
36	Correct	4 ms	4784 KB	Output is correct
37	Correct	4 ms	4692 KB	Output is correct
38	Correct	4 ms	4692 KB	Output is correct
39	Correct	4 ms	4692 KB	Output is correct
40	Correct	4 ms	4692 KB	Output is correct

Subtask #5

36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	304 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	308 KB	Output is correct
11	Correct	1 ms	340 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	304 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	1 ms	340 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	1108 KB	Output is correct
22	Correct	1 ms	1108 KB	Output is correct
23	Correct	1 ms	1108 KB	Output is correct
24	Correct	1 ms	1108 KB	Output is correct
25	Correct	1 ms	1108 KB	Output is correct
26	Correct	1 ms	1108 KB	Output is correct
27	Correct	1 ms	1072 KB	Output is correct
28	Correct	1 ms	1108 KB	Output is correct
29	Correct	1 ms	1108 KB	Output is correct
30	Correct	1 ms	1076 KB	Output is correct
31	Correct	4 ms	4692 KB	Output is correct
32	Correct	5 ms	4692 KB	Output is correct
33	Correct	4 ms	4692 KB	Output is correct
34	Correct	4 ms	4788 KB	Output is correct
35	Correct	4 ms	4788 KB	Output is correct
36	Correct	4 ms	4784 KB	Output is correct
37	Correct	4 ms	4692 KB	Output is correct
38	Correct	4 ms	4692 KB	Output is correct
39	Correct	4 ms	4692 KB	Output is correct
40	Correct	4 ms	4692 KB	Output is correct
41	Correct	197 ms	67280 KB	Output is correct
42	Correct	223 ms	67304 KB	Output is correct
43	Correct	228 ms	67404 KB	Output is correct
44	Correct	217 ms	67320 KB	Output is correct
45	Correct	218 ms	67276 KB	Output is correct
46	Correct	223 ms	67372 KB	Output is correct
47	Correct	217 ms	67244 KB	Output is correct
48	Correct	218 ms	67300 KB	Output is correct
49	Correct	225 ms	67464 KB	Output is correct
50	Correct	222 ms	67340 KB	Output is correct
51	Correct	230 ms	67276 KB	Output is correct
52	Correct	213 ms	67396 KB	Output is correct
53	Correct	213 ms	67236 KB	Output is correct
54	Correct	221 ms	67288 KB	Output is correct
55	Correct	223 ms	67340 KB	Output is correct