oj.uz

Submission #939045

# Submission time Handle Problem Language Result Execution time Memory
939045 2024-03-06T04:20:23 Z weakweakweak Group Photo (JOI21_ho_t3) C++17
100 / 100
 726 ms 122232 KB 
#include <bits/stdc++.h>
using namespace std;

int n, dp[5100], a[5100], cost[5100][5100] = {0};
short woo[5100][5100] = {0}; //woo[i][j]代表在i前面大於j的有幾個

struct BIT {
    int n, a[5100];
    void init (int x) {
        n = x;
        memset(a, 0, sizeof(a));
    }
    void update (int i, int x) {for (;i <= n; i += i & -i) a[i] += x; }
    int query (int i) {
        int res = 0;
        for (; i > 0; i -= i & -i) res += a[i];
        return res;
    }
} bit;


int main () {
    ios_base::sync_with_stdio(false); cin.tie(0);
    memset(dp, 63, sizeof(dp));
    dp[0] = 0;
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i];
    
    //順序數對
    int cnt = 0;
    for (int l = 1; l <= n; l++) {
        bit.init(n);
        for (int j = 1; j <= n; j++) {
            if (a[j] < l) continue;
            cost[l][a[j]] = bit.query(a[j]);
            bit.update(a[j], 1);
        }
        for (int r = l; r <= n; r++) cost[l][r + 1] += cost[l][r];
    }
    //在我前面比r大的跟我換
    bit.init(n);
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n + 2; j++) woo[a[i]][j] = i - 1 - bit.query(j);
        bit.update(a[i], 1);
    }
    for (int r = 1; r <= n; r++) {
        int haha = 0;
        for (int l = r; l >= 1; l--) {
            haha += woo[l][r];
            cost[l][r] += haha;
        }
    }

    //dp
    for (int i = 1; i <= n; i++) for (int j = 0; j < i; j++) dp[i] = min(dp[i], dp[j] + cost[j + 1][i]);
    cout << dp[n] << '\n';
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:30:9: warning: unused variable 'cnt' [-Wunused-variable]
   30 |     int cnt = 0;
      |         ^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 1 ms 2648 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 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 2 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4584 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 2 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4584 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 2 ms 8540 KB Output is correct
22 Correct 2 ms 8680 KB Output is correct
23 Correct 2 ms 8540 KB Output is correct
24 Correct 2 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 2 ms 8676 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 2 ms 8536 KB Output is correct
30 Correct 2 ms 8540 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 2 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4584 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 2 ms 8540 KB Output is correct
22 Correct 2 ms 8680 KB Output is correct
23 Correct 2 ms 8540 KB Output is correct
24 Correct 2 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 2 ms 8676 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 2 ms 8536 KB Output is correct
30 Correct 2 ms 8540 KB Output is correct
31 Correct 12 ms 27228 KB Output is correct
32 Correct 13 ms 27228 KB Output is correct
33 Correct 10 ms 27228 KB Output is correct
34 Correct 10 ms 27228 KB Output is correct
35 Correct 10 ms 27228 KB Output is correct
36 Correct 10 ms 27228 KB Output is correct
37 Correct 10 ms 27152 KB Output is correct
38 Correct 11 ms 27228 KB Output is correct
39 Correct 10 ms 27260 KB Output is correct
40 Correct 10 ms 27228 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 2 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4584 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 2 ms 8540 KB Output is correct
22 Correct 2 ms 8680 KB Output is correct
23 Correct 2 ms 8540 KB Output is correct
24 Correct 2 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 2 ms 8676 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 2 ms 8536 KB Output is correct
30 Correct 2 ms 8540 KB Output is correct
31 Correct 12 ms 27228 KB Output is correct
32 Correct 13 ms 27228 KB Output is correct
33 Correct 10 ms 27228 KB Output is correct
34 Correct 10 ms 27228 KB Output is correct
35 Correct 10 ms 27228 KB Output is correct
36 Correct 10 ms 27228 KB Output is correct
37 Correct 10 ms 27152 KB Output is correct
38 Correct 11 ms 27228 KB Output is correct
39 Correct 10 ms 27260 KB Output is correct
40 Correct 10 ms 27228 KB Output is correct
41 Correct 604 ms 121776 KB Output is correct
42 Correct 616 ms 121408 KB Output is correct
43 Correct 595 ms 121648 KB Output is correct
44 Correct 640 ms 121380 KB Output is correct
45 Correct 606 ms 121916 KB Output is correct
46 Correct 609 ms 121652 KB Output is correct
47 Correct 632 ms 122232 KB Output is correct
48 Correct 642 ms 119080 KB Output is correct
49 Correct 726 ms 119084 KB Output is correct
50 Correct 622 ms 121716 KB Output is correct
51 Correct 613 ms 120984 KB Output is correct
52 Correct 605 ms 121168 KB Output is correct
53 Correct 619 ms 121424 KB Output is correct
54 Correct 619 ms 120996 KB Output is correct
55 Correct 612 ms 120996 KB Output is correct