oj.uz

Submission #1059775

# Submission time Handle Problem Language Result Execution time Memory
1059775 2024-08-15T08:07:30 Z aykhn Soccer Stadium (IOI23_soccer) C++17
54 / 100
 196 ms 47404 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 (ok && n > 30)
    {
        int lx = mx[1], rx = mx[1];
        int last = mx[1];
        while (lx >= 0 || rx < N)
        {
            if (cnt[lx] && lx >= 0 && (rx == N || cnt[lx] <= cnt[rx]))
            {
                if (!(l[last] <= l[lx] && r[lx] <= r[last])) 
                {
                    ok = 0;
                    break;
                }
                last = lx;
                lx--;
            }
            else if (cnt[rx] && rx < N && (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 3 ms 3928 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 1 ms 3932 KB ok
6 Correct 0 ms 348 KB ok
7 Correct 1 ms 344 KB ok
8 Correct 13 ms 3420 KB ok
9 Correct 196 ms 47404 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 3932 KB ok
4 Correct 2 ms 3932 KB ok
5 Correct 2 ms 3932 KB ok
6 Correct 2 ms 3932 KB ok
7 Correct 2 ms 3932 KB ok
8 Correct 2 ms 3932 KB ok
9 Correct 2 ms 3932 KB ok
10 Correct 2 ms 3932 KB ok
11 Correct 2 ms 3932 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 2 ms 3932 KB ok

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3928 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 2 ms 3932 KB ok
5 Correct 2 ms 3932 KB ok
6 Correct 2 ms 3932 KB ok
7 Correct 2 ms 3932 KB ok
8 Correct 2 ms 3932 KB ok
9 Correct 2 ms 3932 KB ok
10 Correct 2 ms 3932 KB ok
11 Correct 2 ms 3932 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 2 ms 3932 KB ok
14 Correct 2 ms 3932 KB ok
15 Correct 4 ms 4184 KB ok
16 Correct 4 ms 3928 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 3932 KB ok
21 Correct 4 ms 3932 KB ok
22 Correct 3 ms 3932 KB ok
23 Correct 4 ms 3932 KB ok
24 Correct 3 ms 3932 KB ok
25 Correct 3 ms 3932 KB ok
26 Correct 4 ms 3932 KB ok

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3928 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 2 ms 3932 KB ok
8 Correct 2 ms 3932 KB ok
9 Correct 2 ms 3932 KB ok
10 Correct 2 ms 3932 KB ok
11 Correct 2 ms 3932 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 2 ms 3932 KB ok
14 Correct 2 ms 3932 KB ok
15 Correct 2 ms 3932 KB ok
16 Correct 2 ms 3932 KB ok
17 Correct 4 ms 4184 KB ok
18 Correct 4 ms 3928 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 3932 KB ok
23 Correct 4 ms 3932 KB ok
24 Correct 3 ms 3932 KB ok
25 Correct 4 ms 3932 KB ok
26 Correct 3 ms 3932 KB ok
27 Correct 3 ms 3932 KB ok
28 Correct 4 ms 3932 KB ok
29 Correct 3 ms 3932 KB ok
30 Correct 12 ms 4060 KB ok
31 Correct 11 ms 3932 KB ok
32 Correct 10 ms 3932 KB ok
33 Correct 10 ms 4052 KB ok
34 Correct 11 ms 3932 KB ok
35 Correct 13 ms 4056 KB ok
36 Correct 12 ms 3932 KB ok
37 Correct 10 ms 3932 KB ok
38 Correct 10 ms 3932 KB ok
39 Correct 11 ms 3932 KB ok
40 Correct 10 ms 4064 KB ok
41 Correct 11 ms 4060 KB ok

Subtask #5
0.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3928 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 2 ms 3932 KB ok
8 Correct 2 ms 3932 KB ok
9 Correct 2 ms 3932 KB ok
10 Correct 2 ms 3932 KB ok
11 Correct 2 ms 3932 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 2 ms 3932 KB ok
14 Correct 2 ms 3932 KB ok
15 Correct 2 ms 3932 KB ok
16 Correct 2 ms 3932 KB ok
17 Correct 4 ms 4184 KB ok
18 Correct 4 ms 3928 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 3932 KB ok
23 Correct 4 ms 3932 KB ok
24 Correct 3 ms 3932 KB ok
25 Correct 4 ms 3932 KB ok
26 Correct 3 ms 3932 KB ok
27 Correct 3 ms 3932 KB ok
28 Correct 4 ms 3932 KB ok
29 Correct 3 ms 3932 KB ok
30 Correct 12 ms 4060 KB ok
31 Correct 11 ms 3932 KB ok
32 Correct 10 ms 3932 KB ok
33 Correct 10 ms 4052 KB ok
34 Correct 11 ms 3932 KB ok
35 Correct 13 ms 4056 KB ok
36 Correct 12 ms 3932 KB ok
37 Correct 10 ms 3932 KB ok
38 Correct 10 ms 3932 KB ok
39 Correct 11 ms 3932 KB ok
40 Correct 10 ms 4064 KB ok
41 Correct 11 ms 4060 KB ok
42 Runtime error 29 ms 13904 KB Execution killed with signal 11
43 Halted 0 ms 0 KB -

Subtask #6
0.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3928 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 1 ms 3932 KB ok
7 Correct 0 ms 348 KB ok
8 Correct 1 ms 344 KB ok
9 Correct 13 ms 3420 KB ok
10 Correct 196 ms 47404 KB ok
11 Correct 2 ms 3932 KB ok
12 Correct 2 ms 3932 KB ok
13 Correct 2 ms 3932 KB ok
14 Correct 2 ms 3932 KB ok
15 Correct 2 ms 3932 KB ok
16 Correct 2 ms 3932 KB ok
17 Correct 2 ms 3932 KB ok
18 Correct 2 ms 3932 KB ok
19 Correct 2 ms 3932 KB ok
20 Correct 2 ms 3932 KB ok
21 Correct 2 ms 3932 KB ok
22 Correct 4 ms 4184 KB ok
23 Correct 4 ms 3928 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 3932 KB ok
28 Correct 4 ms 3932 KB ok
29 Correct 3 ms 3932 KB ok
30 Correct 4 ms 3932 KB ok
31 Correct 3 ms 3932 KB ok
32 Correct 3 ms 3932 KB ok
33 Correct 4 ms 3932 KB ok
34 Correct 3 ms 3932 KB ok
35 Correct 12 ms 4060 KB ok
36 Correct 11 ms 3932 KB ok
37 Correct 10 ms 3932 KB ok
38 Correct 10 ms 4052 KB ok
39 Correct 11 ms 3932 KB ok
40 Correct 13 ms 4056 KB ok
41 Correct 12 ms 3932 KB ok
42 Correct 10 ms 3932 KB ok
43 Correct 10 ms 3932 KB ok
44 Correct 11 ms 3932 KB ok
45 Correct 10 ms 4064 KB ok
46 Correct 11 ms 4060 KB ok
47 Runtime error 29 ms 13904 KB Execution killed with signal 11
48 Halted 0 ms 0 KB -