답안 #870026

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
870026	2023-11-06T16:30:17 Z	Pannda	Group Photo (JOI21_ho_t3)	C++17	100 / 100	329 ms	98804 KB

Main

#include <bits/stdc++.h>
using namespace std;

const int INF = (int)1e9 + 123456;

struct Fenwick {
    int n;
    vector<int> bit;

    Fenwick(int n) : n(n), bit(n + 1, 0) {}

    void add(int i, int delta) {
        for (i++; i <= n; i += i & -i) {
            bit[i] += delta;
        }
    }

    int sum(int i) {
        int res = 0;
        for (; i > 0; i -= i & -i) {
            res += bit[i];
        }
        return res;
    }
};

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;
    vector<int> a(n);
    vector<int> ia(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        a[i]--;
        ia[a[i]] = i;
    }

    vector<vector<int>> cost(n, vector<int>(n));
    vector<int> offset(n, 0);
    for (int l = 0; l < n; l++) {
        Fenwick fen(n);
        int inv = 0;
        int sum_indices = 0;
        for (int r = l; r < n; r++) {
            inv += fen.sum(ia[r]);
            fen.add(ia[r], +1);
            sum_indices += ia[r] + offset[ia[r]];

            cost[l][r] = inv + sum_indices - (r - l) * (r - l + 1) / 2;
        }
        for (int i = ia[l] + 1; i < n; i++) {
            offset[i]--;
        }
    }

    vector<int> dp(n + 1, INF);
    dp[0] = 0;
    for (int i = 0; i < n; i++) {
        for (int j = i; j >= 0; j--) {
            dp[i + 1] = min(dp[i + 1], dp[j] + cost[j][i]);
        }
    }
    cout << dp[n] << '\n';
}

Subtask #1
5.0 / 5.0

#	결과	메모리	Grader output
1	Correct	348 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	348 KB	Output is correct
5	Correct	348 KB	Output is correct
6	Correct	348 KB	Output is correct
7	Correct	348 KB	Output is correct
8	Correct	348 KB	Output is correct
9	Correct	348 KB	Output is correct
10	Correct	348 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	메모리	Grader output
1	Correct	348 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	348 KB	Output is correct
5	Correct	348 KB	Output is correct
6	Correct	348 KB	Output is correct
7	Correct	348 KB	Output is correct
8	Correct	348 KB	Output is correct
9	Correct	348 KB	Output is correct
10	Correct	348 KB	Output is correct
11	Correct	348 KB	Output is correct
12	Correct	348 KB	Output is correct
13	Correct	348 KB	Output is correct
14	Correct	348 KB	Output is correct
15	Correct	348 KB	Output is correct
16	Correct	348 KB	Output is correct
17	Correct	348 KB	Output is correct
18	Correct	348 KB	Output is correct
19	Correct	348 KB	Output is correct
20	Correct	348 KB	Output is correct

Subtask #3
32.0 / 32.0

#	결과	실행 시간	메모리	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	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	1 ms	600 KB	Output is correct
22	Correct	1 ms	620 KB	Output is correct
23	Correct	1 ms	604 KB	Output is correct
24	Correct	1 ms	604 KB	Output is correct
25	Correct	0 ms	600 KB	Output is correct
26	Correct	0 ms	604 KB	Output is correct
27	Correct	0 ms	604 KB	Output is correct
28	Correct	1 ms	604 KB	Output is correct
29	Correct	0 ms	604 KB	Output is correct
30	Correct	1 ms	604 KB	Output is correct

Subtask #4
20.0 / 20.0

#	결과	실행 시간	메모리	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	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	1 ms	600 KB	Output is correct
22	Correct	1 ms	620 KB	Output is correct
23	Correct	1 ms	604 KB	Output is correct
24	Correct	1 ms	604 KB	Output is correct
25	Correct	0 ms	600 KB	Output is correct
26	Correct	0 ms	604 KB	Output is correct
27	Correct	0 ms	604 KB	Output is correct
28	Correct	1 ms	604 KB	Output is correct
29	Correct	0 ms	604 KB	Output is correct
30	Correct	1 ms	604 KB	Output is correct
31	Correct	4 ms	2908 KB	Output is correct
32	Correct	5 ms	3000 KB	Output is correct
33	Correct	4 ms	2908 KB	Output is correct
34	Correct	4 ms	2908 KB	Output is correct
35	Correct	4 ms	2908 KB	Output is correct
36	Correct	4 ms	3004 KB	Output is correct
37	Correct	6 ms	2908 KB	Output is correct
38	Correct	4 ms	2908 KB	Output is correct
39	Correct	4 ms	3008 KB	Output is correct
40	Correct	4 ms	2908 KB	Output is correct

Subtask #5
36.0 / 36.0

#	결과	실행 시간	메모리	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	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	1 ms	600 KB	Output is correct
22	Correct	1 ms	620 KB	Output is correct
23	Correct	1 ms	604 KB	Output is correct
24	Correct	1 ms	604 KB	Output is correct
25	Correct	0 ms	600 KB	Output is correct
26	Correct	0 ms	604 KB	Output is correct
27	Correct	0 ms	604 KB	Output is correct
28	Correct	1 ms	604 KB	Output is correct
29	Correct	0 ms	604 KB	Output is correct
30	Correct	1 ms	604 KB	Output is correct
31	Correct	4 ms	2908 KB	Output is correct
32	Correct	5 ms	3000 KB	Output is correct
33	Correct	4 ms	2908 KB	Output is correct
34	Correct	4 ms	2908 KB	Output is correct
35	Correct	4 ms	2908 KB	Output is correct
36	Correct	4 ms	3004 KB	Output is correct
37	Correct	6 ms	2908 KB	Output is correct
38	Correct	4 ms	2908 KB	Output is correct
39	Correct	4 ms	3008 KB	Output is correct
40	Correct	4 ms	2908 KB	Output is correct
41	Correct	308 ms	98384 KB	Output is correct
42	Correct	312 ms	98436 KB	Output is correct
43	Correct	315 ms	98384 KB	Output is correct
44	Correct	320 ms	98536 KB	Output is correct
45	Correct	311 ms	98644 KB	Output is correct
46	Correct	320 ms	98548 KB	Output is correct
47	Correct	317 ms	98564 KB	Output is correct
48	Correct	311 ms	98552 KB	Output is correct
49	Correct	310 ms	98388 KB	Output is correct
50	Correct	319 ms	98804 KB	Output is correct
51	Correct	311 ms	98548 KB	Output is correct
52	Correct	329 ms	98552 KB	Output is correct
53	Correct	311 ms	98384 KB	Output is correct
54	Correct	321 ms	98552 KB	Output is correct
55	Correct	313 ms	98392 KB	Output is correct

답안 #870026

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