Submission #715164

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
715164	2023-03-26T06:42:51 Z	fruith	Group Photo (JOI21_ho_t3)	C++14	100 / 100	268 ms	67576 KB

Main

#include <bits/stdc++.h>
using namespace std;
 
const int MAXN = 5001, INF = 1e9;
 
int n, a[MAXN], p[MAXN], dp[MAXN], inv[MAXN][MAXN];
 
signed main(){
	cin.tie(0)->sync_with_stdio(0);
 
	cin >> n;
	for(int i=1; i<=n; ++i){
		cin >> a[i];
		p[a[i]] = i;
	}
 
	for(int j=2; j<=n; ++j){
		int c = 0;
		for(int i=j-1; i; --i){
			c += p[i] > p[j];
			inv[i][j] = inv[i][j-1] + c;
		}
	}
 
	for(int i=1; i<=n; ++i){
		dp[i] = INF;
		for(int j=0; j<i; ++j){
			dp[i] = min(dp[i], dp[j] + inv[1][i] - inv[1][j] + ((i-j)*(i-j-1))/2 - 2 * inv[j+1][i]);
		}
	}
	cout << dp[n];
}

Subtask #1

5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	336 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	336 KB	Output is correct
4	Correct	0 ms	336 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	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	336 KB	Output is correct

Subtask #2

7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	336 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	336 KB	Output is correct
4	Correct	0 ms	336 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	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	336 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	340 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	328 KB	Output is correct
18	Correct	0 ms	332 KB	Output is correct
19	Correct	1 ms	332 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	336 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	336 KB	Output is correct
4	Correct	0 ms	336 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	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	336 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	340 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	328 KB	Output is correct
18	Correct	0 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	1128 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	1236 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	1240 KB	Output is correct
28	Correct	1 ms	1116 KB	Output is correct
29	Correct	1 ms	1108 KB	Output is correct
30	Correct	1 ms	1116 KB	Output is correct

Subtask #4

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	336 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	336 KB	Output is correct
4	Correct	0 ms	336 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	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	336 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	340 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	328 KB	Output is correct
18	Correct	0 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	1128 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	1236 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	1240 KB	Output is correct
28	Correct	1 ms	1116 KB	Output is correct
29	Correct	1 ms	1108 KB	Output is correct
30	Correct	1 ms	1116 KB	Output is correct
31	Correct	4 ms	4700 KB	Output is correct
32	Correct	6 ms	4820 KB	Output is correct
33	Correct	6 ms	4824 KB	Output is correct
34	Correct	4 ms	4832 KB	Output is correct
35	Correct	5 ms	4792 KB	Output is correct
36	Correct	5 ms	4820 KB	Output is correct
37	Correct	4 ms	4812 KB	Output is correct
38	Correct	4 ms	4820 KB	Output is correct
39	Correct	4 ms	4812 KB	Output is correct
40	Correct	4 ms	4820 KB	Output is correct

Subtask #5

36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	336 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	1 ms	336 KB	Output is correct
4	Correct	0 ms	336 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	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	336 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	340 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	328 KB	Output is correct
18	Correct	0 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	1128 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	1236 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	1240 KB	Output is correct
28	Correct	1 ms	1116 KB	Output is correct
29	Correct	1 ms	1108 KB	Output is correct
30	Correct	1 ms	1116 KB	Output is correct
31	Correct	4 ms	4700 KB	Output is correct
32	Correct	6 ms	4820 KB	Output is correct
33	Correct	6 ms	4824 KB	Output is correct
34	Correct	4 ms	4832 KB	Output is correct
35	Correct	5 ms	4792 KB	Output is correct
36	Correct	5 ms	4820 KB	Output is correct
37	Correct	4 ms	4812 KB	Output is correct
38	Correct	4 ms	4820 KB	Output is correct
39	Correct	4 ms	4812 KB	Output is correct
40	Correct	4 ms	4820 KB	Output is correct
41	Correct	241 ms	67292 KB	Output is correct
42	Correct	233 ms	67276 KB	Output is correct
43	Correct	241 ms	67452 KB	Output is correct
44	Correct	245 ms	67232 KB	Output is correct
45	Correct	229 ms	67236 KB	Output is correct
46	Correct	248 ms	67276 KB	Output is correct
47	Correct	248 ms	67324 KB	Output is correct
48	Correct	239 ms	67476 KB	Output is correct
49	Correct	247 ms	67352 KB	Output is correct
50	Correct	231 ms	67356 KB	Output is correct
51	Correct	257 ms	67260 KB	Output is correct
52	Correct	231 ms	67276 KB	Output is correct
53	Correct	245 ms	67356 KB	Output is correct
54	Correct	268 ms	67364 KB	Output is correct
55	Correct	237 ms	67576 KB	Output is correct