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Submission #935069

# Submission time Handle Problem Language Result Execution time Memory
935069 2024-02-28T14:11:00 Z haxorman Group Photo (JOI21_ho_t3) C++14
100 / 100
 254 ms 197008 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long

const int mxN = 5007;

int arr[mxN], pos[mxN], inv[mxN][mxN], dp[mxN];

int f(int h) {
    if (!h) {
        return 0;
    }

    if (dp[h] != -1) {
        return dp[h];
    }
    
    int ret = INT_MAX, add = 0;
    for (int x = h; x >= 1; --x) {
        add += h - pos[x] + 2*inv[x][h] - inv[x][x];
        ret = min(ret, f(x-1) + add);
    }
    return dp[h] = ret;
}

int32_t main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    
    int n;
    cin >> n;

    for (int i = 1; i <= n; ++i) {
        cin >> arr[i];
        pos[arr[i]] = i;
    }

    for (int y = 1; y <= n; ++y) {
        int cnt = 0;
        for (int i = 1; i <= n; ++i) {
            if (arr[i] > y) {
                ++cnt;
            }
            inv[arr[i]][y] = cnt;
        }
    }

    memset(dp, -1, sizeof(dp));
    cout << f(n) << "\n";
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 2396 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 2396 KB Output is correct
6 Correct 1 ms 2396 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 344 KB Output is correct
2 Correct 1 ms 2396 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 2396 KB Output is correct
6 Correct 1 ms 2396 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 2392 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 0 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 2396 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 2396 KB Output is correct
6 Correct 1 ms 2396 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 2392 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 0 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct
21 Correct 2 ms 8536 KB Output is correct
22 Correct 1 ms 8540 KB Output is correct
23 Correct 1 ms 8652 KB Output is correct
24 Correct 1 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 1 ms 8660 KB Output is correct
27 Correct 1 ms 8540 KB Output is correct
28 Correct 1 ms 8792 KB Output is correct
29 Correct 2 ms 8540 KB Output is correct
30 Correct 1 ms 8540 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 2396 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 2396 KB Output is correct
6 Correct 1 ms 2396 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 2392 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 0 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct
21 Correct 2 ms 8536 KB Output is correct
22 Correct 1 ms 8540 KB Output is correct
23 Correct 1 ms 8652 KB Output is correct
24 Correct 1 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 1 ms 8660 KB Output is correct
27 Correct 1 ms 8540 KB Output is correct
28 Correct 1 ms 8792 KB Output is correct
29 Correct 2 ms 8540 KB Output is correct
30 Correct 1 ms 8540 KB Output is correct
31 Correct 9 ms 33380 KB Output is correct
32 Correct 6 ms 33372 KB Output is correct
33 Correct 6 ms 33372 KB Output is correct
34 Correct 6 ms 33368 KB Output is correct
35 Correct 6 ms 33372 KB Output is correct
36 Correct 6 ms 33272 KB Output is correct
37 Correct 6 ms 33260 KB Output is correct
38 Correct 6 ms 33372 KB Output is correct
39 Correct 7 ms 33372 KB Output is correct
40 Correct 6 ms 33372 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 2396 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 2396 KB Output is correct
6 Correct 1 ms 2396 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 2392 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 0 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct
21 Correct 2 ms 8536 KB Output is correct
22 Correct 1 ms 8540 KB Output is correct
23 Correct 1 ms 8652 KB Output is correct
24 Correct 1 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 1 ms 8660 KB Output is correct
27 Correct 1 ms 8540 KB Output is correct
28 Correct 1 ms 8792 KB Output is correct
29 Correct 2 ms 8540 KB Output is correct
30 Correct 1 ms 8540 KB Output is correct
31 Correct 9 ms 33380 KB Output is correct
32 Correct 6 ms 33372 KB Output is correct
33 Correct 6 ms 33372 KB Output is correct
34 Correct 6 ms 33368 KB Output is correct
35 Correct 6 ms 33372 KB Output is correct
36 Correct 6 ms 33272 KB Output is correct
37 Correct 6 ms 33260 KB Output is correct
38 Correct 6 ms 33372 KB Output is correct
39 Correct 7 ms 33372 KB Output is correct
40 Correct 6 ms 33372 KB Output is correct
41 Correct 254 ms 196944 KB Output is correct
42 Correct 249 ms 196688 KB Output is correct
43 Correct 237 ms 196664 KB Output is correct
44 Correct 227 ms 196804 KB Output is correct
45 Correct 226 ms 196688 KB Output is correct
46 Correct 231 ms 196948 KB Output is correct
47 Correct 231 ms 196944 KB Output is correct
48 Correct 226 ms 196780 KB Output is correct
49 Correct 231 ms 197008 KB Output is correct
50 Correct 228 ms 196692 KB Output is correct
51 Correct 223 ms 196940 KB Output is correct
52 Correct 235 ms 196916 KB Output is correct
53 Correct 226 ms 196764 KB Output is correct
54 Correct 240 ms 196940 KB Output is correct
55 Correct 229 ms 196728 KB Output is correct