oj.uz

Submission #1059786

# Submission time Handle Problem Language Result Execution time Memory
1059786 2024-08-15T08:11:14 Z aykhn Soccer Stadium (IOI23_soccer) C++17
54 / 100
 229 ms 47400 KB 
#include <bits/stdc++.h>
#include "soccer.h"
 
using namespace std;
 
int n;
vector<vector<int>> A;
int dp[31][31][31][31];
int cur;
 
int f(int i, int pos, int l, int r)
{
    if (i < 0 || i >= n) return 0;
    if (l > r) return 0;
    if (pos >= n) return 0;
    if (dp[i][pos][l][r] != -1) return dp[i][pos][l][r];
    vector<int> v;
    v.push_back(l - 1);
    for (int j = l; j <= r; j++) if (A[i][j]) v.push_back(j);
    v.push_back(r + 1);
    int res = 0;
    for (int j = 1; j < v.size(); j++)
    {
        if (i <= cur) 
        {
            res = max(res, f(i - 1, pos + 1, v[j - 1] + 1, v[j] - 1) + (v[j] - v[j - 1] - 1));
            res = max(res, f(cur + (pos - (cur - i)) + 1, pos + 1, v[j - 1] + 1, v[j] - 1) + (v[j] - v[j - 1] - 1));
        }
        else
        {
            res = max(res, f(i + 1, pos + 1, v[j - 1] + 1, v[j] - 1) + (v[j] - v[j - 1] - 1));
            res = max(res, f(cur - (pos - (i - cur)) - 1, pos + 1, v[j - 1] + 1, v[j] - 1) + (v[j] - v[j - 1] - 1));
        }
    }
    return dp[i][pos][l][r] = res;
}
 
int solve()
{
    for (int i = 0; i < 31; i++)
    {
        for (int j = 0; j < 31; j++)
        {
            for (int k = 0; k < 31; k++)
            {
                for (int l = k; l < 31; l++) dp[i][j][k][l] = -1;
            }
        }
    }
    return f(cur, 0, 0, n - 1);
}
 
int calc(int i, int j)
{
    return i * n + j * n - i * j;
}
 
int biggest_stadium(int N, vector<vector<int>> B)
{
    n = N;
    A = B;
    int c = 0;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            c += A[i][j];
        }
    }
    if (c == 1)
    {
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < n; j++)
            {
                if (A[i][j])
                {
                    int i1 = n - i - 1, j1 = n - j - 1;
                    return max({calc(i, j), calc(i1, j), calc(i, j1), calc(i1, j1)});
                }
            }
        }
    }
    int ok = 1, c1 = 0;
    int l[N], r[N], cnt[N];
    array<int, 2> mx = {-1, -1};
    for (int i = 0; i < n; i++)
    {
        cnt[i] = 0;
        l[i] = n + 1, r[i] = -1;
        for (int j = 0; j < n; j++)
        {
            if (A[i][j]) continue;
            cnt[i]++,
            l[i] = min(l[i], j), r[i] = max(r[i], j);
        }
        if (!cnt[i]) continue;
        if (cnt[i] != r[i] - l[i] + 1) ok = 0;
        c1++;
        mx = max(mx, {cnt[i], i});
    }
    if (N > 30)
    {
        assert(mx[1] != -1);
        int lx = mx[1] - 1, rx = mx[1] + 1;
        int last = mx[1];
        while (lx >= 0 || rx < N)
        {
            if (lx >= 0 && cnt[lx] && (rx == N || cnt[lx] <= cnt[rx]))
            {
                if (!(l[last] <= l[lx] && r[lx] <= r[last])) 
                {
                    ok = 0;
                    break;
                }
                last = lx;
                lx--;
            }
            else if (rx < N && cnt[rx] && (lx == -1 || cnt[rx] <= cnt[lx]))
            {
                if (!(l[last] <= l[rx] && r[rx] <= r[last])) 
                {
                    ok = 0;
                    break;
                }
                last = rx;
                rx++;
            }
            else break;
        }
        if (rx - lx - 1 == c1 && ok)
        {
            return n * n - c;
        }
        return 0;
    }
    int res = 0;
    for (cur = 0; cur < n; cur++)
    {
        res = max(res, solve());
    }
    return res;
}

Compilation message

soccer.cpp: In function 'int f(int, int, int, int)':
soccer.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for (int j = 1; j < v.size(); j++)
      |                     ~~^~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3932 KB ok

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 0 ms 348 KB ok
5 Correct 2 ms 3932 KB ok
6 Correct 0 ms 348 KB ok
7 Correct 1 ms 348 KB ok
8 Correct 16 ms 3232 KB ok
9 Correct 229 ms 47400 KB ok

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 2 ms 4184 KB ok
4 Correct 2 ms 3932 KB ok
5 Correct 2 ms 3936 KB ok
6 Correct 2 ms 3932 KB ok
7 Correct 3 ms 3932 KB ok
8 Correct 3 ms 3932 KB ok
9 Correct 2 ms 3932 KB ok
10 Correct 3 ms 3868 KB ok
11 Correct 2 ms 3932 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 3 ms 3932 KB ok

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3932 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 2 ms 4184 KB ok
5 Correct 2 ms 3932 KB ok
6 Correct 2 ms 3936 KB ok
7 Correct 2 ms 3932 KB ok
8 Correct 3 ms 3932 KB ok
9 Correct 3 ms 3932 KB ok
10 Correct 2 ms 3932 KB ok
11 Correct 3 ms 3868 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 2 ms 3932 KB ok
14 Correct 3 ms 3932 KB ok
15 Correct 3 ms 4048 KB ok
16 Correct 3 ms 3932 KB ok
17 Correct 3 ms 3932 KB ok
18 Correct 3 ms 3932 KB ok
19 Correct 3 ms 3932 KB ok
20 Correct 3 ms 3824 KB ok
21 Correct 3 ms 4044 KB ok
22 Correct 3 ms 4048 KB ok
23 Correct 3 ms 3932 KB ok
24 Correct 3 ms 3928 KB ok
25 Correct 3 ms 4048 KB ok
26 Correct 5 ms 3844 KB ok

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3932 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 0 ms 348 KB ok
5 Correct 0 ms 348 KB ok
6 Correct 2 ms 4184 KB ok
7 Correct 2 ms 3932 KB ok
8 Correct 2 ms 3936 KB ok
9 Correct 2 ms 3932 KB ok
10 Correct 3 ms 3932 KB ok
11 Correct 3 ms 3932 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 3 ms 3868 KB ok
14 Correct 2 ms 3932 KB ok
15 Correct 2 ms 3932 KB ok
16 Correct 3 ms 3932 KB ok
17 Correct 3 ms 4048 KB ok
18 Correct 3 ms 3932 KB ok
19 Correct 3 ms 3932 KB ok
20 Correct 3 ms 3932 KB ok
21 Correct 3 ms 3932 KB ok
22 Correct 3 ms 3824 KB ok
23 Correct 3 ms 4044 KB ok
24 Correct 3 ms 4048 KB ok
25 Correct 3 ms 3932 KB ok
26 Correct 3 ms 3928 KB ok
27 Correct 3 ms 4048 KB ok
28 Correct 5 ms 3844 KB ok
29 Correct 4 ms 3932 KB ok
30 Correct 12 ms 4064 KB ok
31 Correct 14 ms 3932 KB ok
32 Correct 11 ms 3928 KB ok
33 Correct 10 ms 3936 KB ok
34 Correct 13 ms 4068 KB ok
35 Correct 12 ms 4196 KB ok
36 Correct 12 ms 3976 KB ok
37 Correct 10 ms 3940 KB ok
38 Correct 10 ms 3944 KB ok
39 Correct 10 ms 3944 KB ok
40 Correct 11 ms 3944 KB ok
41 Correct 12 ms 3940 KB ok

Subtask #5
0.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3932 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 0 ms 348 KB ok
5 Correct 0 ms 348 KB ok
6 Correct 2 ms 4184 KB ok
7 Correct 2 ms 3932 KB ok
8 Correct 2 ms 3936 KB ok
9 Correct 2 ms 3932 KB ok
10 Correct 3 ms 3932 KB ok
11 Correct 3 ms 3932 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 3 ms 3868 KB ok
14 Correct 2 ms 3932 KB ok
15 Correct 2 ms 3932 KB ok
16 Correct 3 ms 3932 KB ok
17 Correct 3 ms 4048 KB ok
18 Correct 3 ms 3932 KB ok
19 Correct 3 ms 3932 KB ok
20 Correct 3 ms 3932 KB ok
21 Correct 3 ms 3932 KB ok
22 Correct 3 ms 3824 KB ok
23 Correct 3 ms 4044 KB ok
24 Correct 3 ms 4048 KB ok
25 Correct 3 ms 3932 KB ok
26 Correct 3 ms 3928 KB ok
27 Correct 3 ms 4048 KB ok
28 Correct 5 ms 3844 KB ok
29 Correct 4 ms 3932 KB ok
30 Correct 12 ms 4064 KB ok
31 Correct 14 ms 3932 KB ok
32 Correct 11 ms 3928 KB ok
33 Correct 10 ms 3936 KB ok
34 Correct 13 ms 4068 KB ok
35 Correct 12 ms 4196 KB ok
36 Correct 12 ms 3976 KB ok
37 Correct 10 ms 3940 KB ok
38 Correct 10 ms 3944 KB ok
39 Correct 10 ms 3944 KB ok
40 Correct 11 ms 3944 KB ok
41 Correct 12 ms 3940 KB ok
42 Partially correct 15 ms 3244 KB partial
43 Partially correct 16 ms 3240 KB partial
44 Partially correct 13 ms 3448 KB partial
45 Partially correct 13 ms 3248 KB partial
46 Partially correct 13 ms 3428 KB partial
47 Partially correct 15 ms 3248 KB partial
48 Incorrect 13 ms 3432 KB wrong
49 Halted 0 ms 0 KB -

Subtask #6
0.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3932 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 0 ms 348 KB ok
5 Correct 0 ms 348 KB ok
6 Correct 2 ms 3932 KB ok
7 Correct 0 ms 348 KB ok
8 Correct 1 ms 348 KB ok
9 Correct 16 ms 3232 KB ok
10 Correct 229 ms 47400 KB ok
11 Correct 2 ms 4184 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 2 ms 3936 KB ok
14 Correct 2 ms 3932 KB ok
15 Correct 3 ms 3932 KB ok
16 Correct 3 ms 3932 KB ok
17 Correct 2 ms 3932 KB ok
18 Correct 3 ms 3868 KB ok
19 Correct 2 ms 3932 KB ok
20 Correct 2 ms 3932 KB ok
21 Correct 3 ms 3932 KB ok
22 Correct 3 ms 4048 KB ok
23 Correct 3 ms 3932 KB ok
24 Correct 3 ms 3932 KB ok
25 Correct 3 ms 3932 KB ok
26 Correct 3 ms 3932 KB ok
27 Correct 3 ms 3824 KB ok
28 Correct 3 ms 4044 KB ok
29 Correct 3 ms 4048 KB ok
30 Correct 3 ms 3932 KB ok
31 Correct 3 ms 3928 KB ok
32 Correct 3 ms 4048 KB ok
33 Correct 5 ms 3844 KB ok
34 Correct 4 ms 3932 KB ok
35 Correct 12 ms 4064 KB ok
36 Correct 14 ms 3932 KB ok
37 Correct 11 ms 3928 KB ok
38 Correct 10 ms 3936 KB ok
39 Correct 13 ms 4068 KB ok
40 Correct 12 ms 4196 KB ok
41 Correct 12 ms 3976 KB ok
42 Correct 10 ms 3940 KB ok
43 Correct 10 ms 3944 KB ok
44 Correct 10 ms 3944 KB ok
45 Correct 11 ms 3944 KB ok
46 Correct 12 ms 3940 KB ok
47 Partially correct 15 ms 3244 KB partial
48 Partially correct 16 ms 3240 KB partial
49 Partially correct 13 ms 3448 KB partial
50 Partially correct 13 ms 3248 KB partial
51 Partially correct 13 ms 3428 KB partial
52 Partially correct 15 ms 3248 KB partial
53 Incorrect 13 ms 3432 KB wrong
54 Halted 0 ms 0 KB -