Submission #921413

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
921413	2024-02-03T19:32:31 Z	TAhmed33	Group Photo (JOI21_ho_t3)	C++	100 / 100	443 ms	174688 KB

Main

#include <bits/stdc++.h>
using namespace std;
int n, a[5001], dp[5001], pos[5001], inv[5001][5001], calc2[5001][5001];
struct BIT {
	int tree[5001];
	void add (int x) {
		for (; x <= 5000; x += x & (-x)) tree[x]++;
	}
	int get (int x) {
		int sum = 0;
		for (; x > 0; x -= x & (-x)) sum += tree[x];
		return sum;
	}
} cur;
int main () {
	cin >> n;
	for (int i = 1; i <= n; i++) cin >> a[i], pos[a[i]] = i;
	for (int i = 1; i <= n; i++) {
		memset(cur.tree, 0, sizeof(cur.tree));
		for (int j = i; j <= n; j++) {
			inv[i][j] = cur.get(pos[j] - 1) + inv[i][j - 1];
			cur.add(pos[j]);
		}
	}	
	for (int i = 1; i <= n; i++) {
		for (int j = i - 1; j >= 1; j--) {
			if (a[j] > a[i]) {
				calc2[a[i] + 1][a[j]]++;
			}
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= i; j++) {
			calc2[j][i] += calc2[j - 1][i];
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = i; j <= n; j++) {
			calc2[i][j] += calc2[i][j - 1];
		}
	}
	for (int i = 1; i <= n; i++) {
		dp[i] = 1e9;
		for (int j = i; j >= 1; j--) {
			int sum = calc2[j][i] - calc2[j][j - 1];
			dp[i] = min(dp[i], dp[j - 1] + sum + inv[j][i]);
		}
	}
	cout << dp[n] << '\n';
}

Subtask #1
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	412 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct

Subtask #2
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	412 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2392 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct

Subtask #3
32.0 / 32.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	412 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2392 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	2 ms	5464 KB	Output is correct
22	Correct	2 ms	5468 KB	Output is correct
23	Correct	2 ms	5468 KB	Output is correct
24	Correct	2 ms	5468 KB	Output is correct
25	Correct	2 ms	5468 KB	Output is correct
26	Correct	2 ms	5468 KB	Output is correct
27	Correct	1 ms	5468 KB	Output is correct
28	Correct	2 ms	5464 KB	Output is correct
29	Correct	2 ms	5468 KB	Output is correct
30	Correct	2 ms	5468 KB	Output is correct

Subtask #4
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	412 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2392 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	2 ms	5464 KB	Output is correct
22	Correct	2 ms	5468 KB	Output is correct
23	Correct	2 ms	5468 KB	Output is correct
24	Correct	2 ms	5468 KB	Output is correct
25	Correct	2 ms	5468 KB	Output is correct
26	Correct	2 ms	5468 KB	Output is correct
27	Correct	1 ms	5468 KB	Output is correct
28	Correct	2 ms	5464 KB	Output is correct
29	Correct	2 ms	5468 KB	Output is correct
30	Correct	2 ms	5468 KB	Output is correct
31	Correct	12 ms	21340 KB	Output is correct
32	Correct	12 ms	21364 KB	Output is correct
33	Correct	11 ms	21340 KB	Output is correct
34	Correct	13 ms	21340 KB	Output is correct
35	Correct	13 ms	21340 KB	Output is correct
36	Correct	13 ms	21444 KB	Output is correct
37	Correct	13 ms	21296 KB	Output is correct
38	Correct	12 ms	21220 KB	Output is correct
39	Correct	15 ms	21340 KB	Output is correct
40	Correct	12 ms	21432 KB	Output is correct

Subtask #5
36.0 / 36.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	412 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2392 KB	Output is correct
19	Correct	1 ms	2392 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	2 ms	5464 KB	Output is correct
22	Correct	2 ms	5468 KB	Output is correct
23	Correct	2 ms	5468 KB	Output is correct
24	Correct	2 ms	5468 KB	Output is correct
25	Correct	2 ms	5468 KB	Output is correct
26	Correct	2 ms	5468 KB	Output is correct
27	Correct	1 ms	5468 KB	Output is correct
28	Correct	2 ms	5464 KB	Output is correct
29	Correct	2 ms	5468 KB	Output is correct
30	Correct	2 ms	5468 KB	Output is correct
31	Correct	12 ms	21340 KB	Output is correct
32	Correct	12 ms	21364 KB	Output is correct
33	Correct	11 ms	21340 KB	Output is correct
34	Correct	13 ms	21340 KB	Output is correct
35	Correct	13 ms	21340 KB	Output is correct
36	Correct	13 ms	21444 KB	Output is correct
37	Correct	13 ms	21296 KB	Output is correct
38	Correct	12 ms	21220 KB	Output is correct
39	Correct	15 ms	21340 KB	Output is correct
40	Correct	12 ms	21432 KB	Output is correct
41	Correct	443 ms	174408 KB	Output is correct
42	Correct	437 ms	174468 KB	Output is correct
43	Correct	425 ms	174348 KB	Output is correct
44	Correct	422 ms	174368 KB	Output is correct
45	Correct	420 ms	174512 KB	Output is correct
46	Correct	426 ms	174352 KB	Output is correct
47	Correct	425 ms	174688 KB	Output is correct
48	Correct	427 ms	174332 KB	Output is correct
49	Correct	424 ms	174476 KB	Output is correct
50	Correct	433 ms	174476 KB	Output is correct
51	Correct	443 ms	174324 KB	Output is correct
52	Correct	423 ms	174680 KB	Output is correct
53	Correct	429 ms	174420 KB	Output is correct
54	Correct	414 ms	174676 KB	Output is correct
55	Correct	441 ms	174420 KB	Output is correct

Submission #921413

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