oj.uz

Submission #900230

# Submission time Handle Problem Language Result Execution time Memory
900230 2024-01-07T23:13:45 Z MilosMilutinovic Soccer Stadium (IOI23_soccer) C++17
61 / 100
 603 ms 361244 KB 
#include "soccer.h"
#include <bits/stdc++.h>

using namespace std;

const int inf = (int) 1e9;

const int N = 52;

int dp[N][N][N][N];

const int dx[] = {1, 0, -1, 0};
const int dy[] = {0, 1, 0, -1};

bool check_all(int n, vector<vector<int>> a) {
  vector<vector<bool>> was(n, vector<bool>(n));
  function<void(int, int)> Dfs = [&](int x, int y) {
    if (x < 0 || x >= n || y < 0 || y >= n || a[x][y] == 1 || was[x][y]) {
      return;
    }
    was[x][y] = true;
    for (int d = 0; d < 4; d++) {
      Dfs(x + dx[d], y + dy[d]);
    }
  };
  bool done = false;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      if (!done && a[i][j] == 0) {
        Dfs(i, j);
        done = true;
      }
    }
  }
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      if (a[i][j] == 0 && !was[i][j]) {
        return false;
      }
    }
  }
  vector<pair<int, int>> seg;
  for (int j = 0; j < n; j++) {
    int cnt = 0;
    for (int i = 0; i < n; i++) {
      if (a[i][j] == 1) {
        continue;
      }
      cnt += 1;
      if (cnt == 2) {
        return false;
      }
      int ptr = i;
      while (ptr + 1 < n && a[ptr + 1][j] == 0) {
        ptr += 1;
      }
      seg.emplace_back(i, ptr);
      i = ptr;
    }
  }
  int sz = (int) seg.size();
  int mx = 0;
  for (int i = 1; i < sz; i++) {
    if (seg[i].second - seg[i].first > seg[mx].second - seg[mx].first) {
      mx = i;
    }
  }
  int l = mx, r = mx, lst = mx;
  while (l != 0 || r != sz - 1) {
    if (l == 0 || (r + 1 < sz && seg[r + 1].second - seg[r + 1].first > seg[l - 1].second - seg[l - 1].first)) {
      if (!(seg[lst].first <= seg[r + 1].first && seg[r + 1].second <= seg[lst].second)) {
        return false;
      }
      r += 1;
      lst = r;
    } else {
      if (!(seg[lst].first <= seg[l - 1].first && seg[l - 1].second <= seg[lst].second)) {
        return false;
      }
      l -= 1;
      lst = l;
    }
  }
  return true;
}

int biggest_stadium(int n, vector<vector<int>> a) {
  if (check_all(n, a)) {
    int cnt = 0;
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        if (a[i][j] == 0) {
          cnt += 1;
        }
      }
    }
    return cnt;
  }
  if (n > 50) {
    return 0;
  }
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      for (int x = 0; x < n; x++) {
        for (int y = 0; y < n; y++) {
          dp[i][j][x][y] = -inf;
        }
      }
    }
  }
  for (int r = 0; r < n; r++) {
    for (int l = r; l >= 0; l--) {
      if (l == r) {
        for (int i = 0; i < n; i++) {
          int cnt = 0;
          for (int j = i; j < n; j++) {
            cnt += 1;
            if (a[l][j] == 1) {
              break;
            }
            dp[l][r][i][j] = cnt;
          }
        }
        continue;
      }
      {
        // left
        for (int i = 0; i < n; i++) {
          for (int j = i; j < n; j++) {
            if (a[l][j] == 1) {
              break;
            }
            for (int x = 0; x <= i; x++) {
              for (int y = j; y < n; y++) {
                dp[l][r][i][j] = max(dp[l][r][i][j], dp[l + 1][r][x][y] + (j - i + 1));
              }
            }
          }
        }
      }
      {
        // right
        for (int i = 0; i < n; i++) {
          for (int j = i; j < n; j++) {
            if (a[r][j] == 1) {
              break;
            }
            for (int x = 0; x <= i; x++) {
              for (int y = j; y < n; y++) {
                dp[l][r][i][j] = max(dp[l][r][i][j], dp[l][r - 1][x][y] + (j - i + 1));
              }
            }
          }
        }
      }
    }
  }
  int res = 0;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      for (int x = 0; x < n; x++) {
        for (int y = 0; y < n; y++) {
          res = max(res, dp[i][j][x][y]);
        }
      }
    }
  }
  return res;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB ok

Subtask #1
1.5 / 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 0 ms 348 KB ok
6 Correct 0 ms 2396 KB ok
7 Partially correct 2 ms 1112 KB partial
8 Partially correct 35 ms 22964 KB partial
9 Partially correct 603 ms 361244 KB partial

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 1 ms 2392 KB ok
4 Correct 1 ms 2396 KB ok
5 Correct 1 ms 2392 KB ok
6 Correct 0 ms 2396 KB ok
7 Correct 1 ms 2396 KB ok
8 Correct 0 ms 348 KB ok
9 Correct 0 ms 348 KB ok
10 Correct 0 ms 2396 KB ok
11 Correct 1 ms 2396 KB ok
12 Correct 0 ms 2396 KB ok
13 Correct 0 ms 348 KB ok

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB ok
2 Correct 0 ms 348 KB ok
3 Correct 0 ms 348 KB ok
4 Correct 1 ms 2392 KB ok
5 Correct 1 ms 2396 KB ok
6 Correct 1 ms 2392 KB ok
7 Correct 0 ms 2396 KB ok
8 Correct 1 ms 2396 KB ok
9 Correct 0 ms 348 KB ok
10 Correct 0 ms 348 KB ok
11 Correct 0 ms 2396 KB ok
12 Correct 1 ms 2396 KB ok
13 Correct 0 ms 2396 KB ok
14 Correct 0 ms 348 KB ok
15 Correct 1 ms 4696 KB ok
16 Correct 1 ms 4444 KB ok
17 Correct 1 ms 4444 KB ok
18 Correct 1 ms 4444 KB ok
19 Correct 1 ms 4444 KB ok
20 Correct 0 ms 344 KB ok
21 Correct 0 ms 348 KB ok
22 Correct 1 ms 4444 KB ok
23 Correct 1 ms 4444 KB ok
24 Correct 1 ms 4444 KB ok
25 Correct 1 ms 4444 KB ok
26 Correct 1 ms 4444 KB ok

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 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 2392 KB ok
7 Correct 1 ms 2396 KB ok
8 Correct 1 ms 2392 KB ok
9 Correct 0 ms 2396 KB ok
10 Correct 1 ms 2396 KB ok
11 Correct 0 ms 348 KB ok
12 Correct 0 ms 348 KB ok
13 Correct 0 ms 2396 KB ok
14 Correct 1 ms 2396 KB ok
15 Correct 0 ms 2396 KB ok
16 Correct 0 ms 348 KB ok
17 Correct 1 ms 4696 KB ok
18 Correct 1 ms 4444 KB ok
19 Correct 1 ms 4444 KB ok
20 Correct 1 ms 4444 KB ok
21 Correct 1 ms 4444 KB ok
22 Correct 0 ms 344 KB ok
23 Correct 0 ms 348 KB ok
24 Correct 1 ms 4444 KB ok
25 Correct 1 ms 4444 KB ok
26 Correct 1 ms 4444 KB ok
27 Correct 1 ms 4444 KB ok
28 Correct 1 ms 4444 KB ok
29 Correct 1 ms 4440 KB ok
30 Correct 22 ms 16988 KB ok
31 Correct 15 ms 16988 KB ok
32 Correct 8 ms 16988 KB ok
33 Correct 4 ms 16988 KB ok
34 Correct 0 ms 348 KB ok
35 Correct 0 ms 348 KB ok
36 Correct 5 ms 16988 KB ok
37 Correct 7 ms 17024 KB ok
38 Correct 7 ms 16984 KB ok
39 Correct 9 ms 16988 KB ok
40 Correct 27 ms 17044 KB ok
41 Correct 31 ms 16984 KB ok

Subtask #5
4.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 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 2392 KB ok
7 Correct 1 ms 2396 KB ok
8 Correct 1 ms 2392 KB ok
9 Correct 0 ms 2396 KB ok
10 Correct 1 ms 2396 KB ok
11 Correct 0 ms 348 KB ok
12 Correct 0 ms 348 KB ok
13 Correct 0 ms 2396 KB ok
14 Correct 1 ms 2396 KB ok
15 Correct 0 ms 2396 KB ok
16 Correct 0 ms 348 KB ok
17 Correct 1 ms 4696 KB ok
18 Correct 1 ms 4444 KB ok
19 Correct 1 ms 4444 KB ok
20 Correct 1 ms 4444 KB ok
21 Correct 1 ms 4444 KB ok
22 Correct 0 ms 344 KB ok
23 Correct 0 ms 348 KB ok
24 Correct 1 ms 4444 KB ok
25 Correct 1 ms 4444 KB ok
26 Correct 1 ms 4444 KB ok
27 Correct 1 ms 4444 KB ok
28 Correct 1 ms 4444 KB ok
29 Correct 1 ms 4440 KB ok
30 Correct 22 ms 16988 KB ok
31 Correct 15 ms 16988 KB ok
32 Correct 8 ms 16988 KB ok
33 Correct 4 ms 16988 KB ok
34 Correct 0 ms 348 KB ok
35 Correct 0 ms 348 KB ok
36 Correct 5 ms 16988 KB ok
37 Correct 7 ms 17024 KB ok
38 Correct 7 ms 16984 KB ok
39 Correct 9 ms 16988 KB ok
40 Correct 27 ms 17044 KB ok
41 Correct 31 ms 16984 KB ok
42 Partially correct 34 ms 17244 KB partial
43 Partially correct 29 ms 12892 KB partial
44 Partially correct 33 ms 22040 KB partial
45 Partially correct 33 ms 22356 KB partial
46 Partially correct 32 ms 20060 KB partial
47 Partially correct 33 ms 22876 KB partial
48 Correct 22 ms 8540 KB ok
49 Partially correct 22 ms 9820 KB partial
50 Partially correct 26 ms 13140 KB partial
51 Partially correct 20 ms 3416 KB partial
52 Partially correct 20 ms 5212 KB partial
53 Partially correct 16 ms 3932 KB partial
54 Partially correct 17 ms 4700 KB partial
55 Partially correct 18 ms 5532 KB partial
56 Partially correct 22 ms 11352 KB partial
57 Partially correct 28 ms 18000 KB partial
58 Partially correct 33 ms 17268 KB partial
59 Partially correct 28 ms 15764 KB partial

Subtask #6
7.5 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 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 0 ms 348 KB ok
7 Correct 0 ms 2396 KB ok
8 Partially correct 2 ms 1112 KB partial
9 Partially correct 35 ms 22964 KB partial
10 Partially correct 603 ms 361244 KB partial
11 Correct 1 ms 2392 KB ok
12 Correct 1 ms 2396 KB ok
13 Correct 1 ms 2392 KB ok
14 Correct 0 ms 2396 KB ok
15 Correct 1 ms 2396 KB ok
16 Correct 0 ms 348 KB ok
17 Correct 0 ms 348 KB ok
18 Correct 0 ms 2396 KB ok
19 Correct 1 ms 2396 KB ok
20 Correct 0 ms 2396 KB ok
21 Correct 0 ms 348 KB ok
22 Correct 1 ms 4696 KB ok
23 Correct 1 ms 4444 KB ok
24 Correct 1 ms 4444 KB ok
25 Correct 1 ms 4444 KB ok
26 Correct 1 ms 4444 KB ok
27 Correct 0 ms 344 KB ok
28 Correct 0 ms 348 KB ok
29 Correct 1 ms 4444 KB ok
30 Correct 1 ms 4444 KB ok
31 Correct 1 ms 4444 KB ok
32 Correct 1 ms 4444 KB ok
33 Correct 1 ms 4444 KB ok
34 Correct 1 ms 4440 KB ok
35 Correct 22 ms 16988 KB ok
36 Correct 15 ms 16988 KB ok
37 Correct 8 ms 16988 KB ok
38 Correct 4 ms 16988 KB ok
39 Correct 0 ms 348 KB ok
40 Correct 0 ms 348 KB ok
41 Correct 5 ms 16988 KB ok
42 Correct 7 ms 17024 KB ok
43 Correct 7 ms 16984 KB ok
44 Correct 9 ms 16988 KB ok
45 Correct 27 ms 17044 KB ok
46 Correct 31 ms 16984 KB ok
47 Partially correct 34 ms 17244 KB partial
48 Partially correct 29 ms 12892 KB partial
49 Partially correct 33 ms 22040 KB partial
50 Partially correct 33 ms 22356 KB partial
51 Partially correct 32 ms 20060 KB partial
52 Partially correct 33 ms 22876 KB partial
53 Correct 22 ms 8540 KB ok
54 Partially correct 22 ms 9820 KB partial
55 Partially correct 26 ms 13140 KB partial
56 Partially correct 20 ms 3416 KB partial
57 Partially correct 20 ms 5212 KB partial
58 Partially correct 16 ms 3932 KB partial
59 Partially correct 17 ms 4700 KB partial
60 Partially correct 18 ms 5532 KB partial
61 Partially correct 22 ms 11352 KB partial
62 Partially correct 28 ms 18000 KB partial
63 Partially correct 33 ms 17268 KB partial
64 Partially correct 28 ms 15764 KB partial
65 Partially correct 504 ms 271700 KB partial
66 Partially correct 245 ms 48208 KB partial
67 Partially correct 238 ms 48156 KB partial
68 Partially correct 560 ms 359120 KB partial
69 Partially correct 549 ms 348756 KB partial
70 Partially correct 536 ms 334872 KB partial
71 Partially correct 575 ms 359764 KB partial
72 Partially correct 570 ms 360792 KB partial
73 Correct 374 ms 128288 KB ok
74 Correct 375 ms 130864 KB ok
75 Partially correct 377 ms 130844 KB partial
76 Partially correct 435 ms 204828 KB partial
77 Partially correct 446 ms 204372 KB partial
78 Partially correct 234 ms 48212 KB partial
79 Partially correct 249 ms 48212 KB partial
80 Partially correct 235 ms 48176 KB partial
81 Partially correct 232 ms 48208 KB partial
82 Partially correct 241 ms 48208 KB partial
83 Partially correct 241 ms 48152 KB partial
84 Partially correct 268 ms 63008 KB partial
85 Partially correct 263 ms 57120 KB partial
86 Partially correct 287 ms 70228 KB partial
87 Partially correct 285 ms 80936 KB partial
88 Partially correct 384 ms 174116 KB partial
89 Partially correct 552 ms 331196 KB partial
90 Partially correct 458 ms 249108 KB partial
91 Partially correct 473 ms 240704 KB partial
92 Partially correct 229 ms 48212 KB partial
93 Partially correct 240 ms 48208 KB partial
94 Partially correct 238 ms 48152 KB partial
95 Partially correct 232 ms 48180 KB partial
96 Partially correct 235 ms 48420 KB partial
97 Partially correct 231 ms 48176 KB partial
98 Partially correct 235 ms 48156 KB partial
99 Partially correct 228 ms 48208 KB partial
100 Partially correct 493 ms 282896 KB partial
101 Partially correct 264 ms 83280 KB partial
102 Partially correct 273 ms 87076 KB partial
103 Partially correct 459 ms 266580 KB partial
104 Partially correct 279 ms 99892 KB partial
105 Partially correct 281 ms 104480 KB partial
106 Partially correct 430 ms 228640 KB partial
107 Partially correct 401 ms 207644 KB partial
108 Partially correct 235 ms 48156 KB partial
109 Partially correct 239 ms 48160 KB partial