Submission #389638

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
389638	2021-04-14T10:27:13 Z	mariowong	Group Photo (JOI21_ho_t3)	C++14	100 / 100	313 ms	67572 KB

Main

#include <bits/stdc++.h>

using namespace std;


int dp[5005],a[5005],pos[5005],n,ans,ps[5005][5005];
int main(){
	ios::sync_with_stdio(false);
	cin >> n;
	for (int i=1;i<=n;i++){
		cin >> a[i];
		pos[a[i]]=i;
	}
	for (int i=1;i<=n;i++){
		for (int j=i+1;j<=n;j++){
			if (pos[i] > pos[j])
			ans++;
		}
	}
	for (int i=2;i<=n;i++){
		for (int j=1;j+i-1<=n;j++){
			ps[i][j]=ps[i-1][j]+ps[i-1][j+1]-ps[i-2][j+1];
			if (pos[j] > pos[j+i-1])
			ps[i][j]++;
		}
	}
	for (int i=1;i<=n;i++){
		for (int j=1;j<=i;j++){
			dp[i]=min(dp[i],dp[j-1]-(ps[i-j+1][j]-(i-j+1)*(i-j)/2+ps[i-j+1][j]));
		}
	}
	cout << ans+dp[n] << '\n';
	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	332 KB	Output is correct
3	Correct	1 ms	260 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	332 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	1 ms	332 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	332 KB	Output is correct
3	Correct	1 ms	260 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	332 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	324 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 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	332 KB	Output is correct
3	Correct	1 ms	260 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	332 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	324 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	1096 KB	Output is correct
22	Correct	1 ms	1100 KB	Output is correct
23	Correct	1 ms	1100 KB	Output is correct
24	Correct	1 ms	1100 KB	Output is correct
25	Correct	1 ms	1100 KB	Output is correct
26	Correct	2 ms	1228 KB	Output is correct
27	Correct	1 ms	1100 KB	Output is correct
28	Correct	1 ms	1100 KB	Output is correct
29	Correct	1 ms	1100 KB	Output is correct
30	Correct	1 ms	1220 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	332 KB	Output is correct
3	Correct	1 ms	260 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	332 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	324 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	1096 KB	Output is correct
22	Correct	1 ms	1100 KB	Output is correct
23	Correct	1 ms	1100 KB	Output is correct
24	Correct	1 ms	1100 KB	Output is correct
25	Correct	1 ms	1100 KB	Output is correct
26	Correct	2 ms	1228 KB	Output is correct
27	Correct	1 ms	1100 KB	Output is correct
28	Correct	1 ms	1100 KB	Output is correct
29	Correct	1 ms	1100 KB	Output is correct
30	Correct	1 ms	1220 KB	Output is correct
31	Correct	8 ms	4684 KB	Output is correct
32	Correct	8 ms	4812 KB	Output is correct
33	Correct	7 ms	4812 KB	Output is correct
34	Correct	7 ms	4804 KB	Output is correct
35	Correct	7 ms	4680 KB	Output is correct
36	Correct	6 ms	4800 KB	Output is correct
37	Correct	7 ms	4812 KB	Output is correct
38	Correct	6 ms	4812 KB	Output is correct
39	Correct	7 ms	4812 KB	Output is correct
40	Correct	7 ms	4812 KB	Output is correct

Subtask #5
36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	260 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	332 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	324 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	1096 KB	Output is correct
22	Correct	1 ms	1100 KB	Output is correct
23	Correct	1 ms	1100 KB	Output is correct
24	Correct	1 ms	1100 KB	Output is correct
25	Correct	1 ms	1100 KB	Output is correct
26	Correct	2 ms	1228 KB	Output is correct
27	Correct	1 ms	1100 KB	Output is correct
28	Correct	1 ms	1100 KB	Output is correct
29	Correct	1 ms	1100 KB	Output is correct
30	Correct	1 ms	1220 KB	Output is correct
31	Correct	8 ms	4684 KB	Output is correct
32	Correct	8 ms	4812 KB	Output is correct
33	Correct	7 ms	4812 KB	Output is correct
34	Correct	7 ms	4804 KB	Output is correct
35	Correct	7 ms	4680 KB	Output is correct
36	Correct	6 ms	4800 KB	Output is correct
37	Correct	7 ms	4812 KB	Output is correct
38	Correct	6 ms	4812 KB	Output is correct
39	Correct	7 ms	4812 KB	Output is correct
40	Correct	7 ms	4812 KB	Output is correct
41	Correct	298 ms	67276 KB	Output is correct
42	Correct	300 ms	67272 KB	Output is correct
43	Correct	293 ms	67272 KB	Output is correct
44	Correct	294 ms	67324 KB	Output is correct
45	Correct	296 ms	67352 KB	Output is correct
46	Correct	303 ms	67396 KB	Output is correct
47	Correct	296 ms	67312 KB	Output is correct
48	Correct	299 ms	67312 KB	Output is correct
49	Correct	312 ms	67340 KB	Output is correct
50	Correct	303 ms	67356 KB	Output is correct
51	Correct	299 ms	67572 KB	Output is correct
52	Correct	306 ms	67288 KB	Output is correct
53	Correct	297 ms	67324 KB	Output is correct
54	Correct	299 ms	67396 KB	Output is correct
55	Correct	313 ms	67320 KB	Output is correct

Submission #389638

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