oj.uz

Submission #992383

# Submission time Handle Problem Language Result Execution time Memory
992383 2024-06-04T11:07:59 Z tch1cherin Chessboard (IZhO18_chessboard) C++17
47 / 100
 2000 ms 10944 KB 
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2")
#include <bits/stdc++.h>
using namespace std;

const int INF = 1e9;

struct segment_tree {
  int size;
  vector<array<int, 2>> tree;
  vector<int> push;

  array<int, 2> merge(array<int, 2> a, array<int, 2> b) {
    return a[0] < b[0] ? a : (a[0] > b[0] ? b : array<int, 2> {a[0], a[1] + b[1]});
  }

  void apply(int x, int value) {
    tree[x][0] += value;
    push[x] += value;
  }

  void propagate(int x) {
    if (push[x] != 0) {
      apply(x * 2, push[x]);
      apply(x * 2 + 1, push[x]);
      push[x] = 0;
    }
  }

  segment_tree(int n) : size(2 << __lg(n)), tree(2 * size, {INF, 0}), push(2 * size) {
    fill(tree.begin() + size, tree.begin() + size + n, array<int, 2> {0, 1});
    for (int i = size - 1; i > 0; i--) {
      tree[i] = merge(tree[i * 2], tree[i * 2 + 1]);
    }
  }
  
  void update(int l, int r, int value) {
    if (l < r) {
      update(l, r, value, 1, 0, size);
    }
  }

  void update(int l, int r, int value, int x, int lx, int rx) {
    if (lx >= r || rx <= l) {
      return;
    } else if (lx >= l && rx <= r) {
      apply(x, value);
    } else {
      propagate(x);
      int mid = (lx + rx) / 2;
      update(l, r, value, x * 2, lx, mid);
      update(l, r, value, x * 2 + 1, mid, rx);
      tree[x] = merge(tree[x * 2], tree[x * 2 + 1]);
    }
  }

  int query() {
    return (tree[1][0] > 0 ? 0 : tree[1][1]);
  }
};

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int N, K;
  cin >> N >> K;
  vector<vector<array<int, 3>>> rect(N + 1);
  for (int i = 0; i < K; i++) {
    int x1, y1, x2, y2;
    cin >> x1 >> y1 >> x2 >> y2;
    x1--, y1--, y2--;
    rect[x1].push_back({y1, y2, 1});
    rect[x2].push_back({y1, y2, -1});
  }
  auto Even = [&](int L, int R, int d) {
    int l = L % (2 * d) >= d ? L + d - L % d : L;
    int r = R % (2 * d) >= d ? R - R % d - 1 : R;
    return l > r ? pair {0, -1} : pair {l / (2 * d) * d + l % (2 * d), r / (2 * d) * d + r % (2 * d)};
  };
  auto Odd = [&](int L, int R, int d) {
    int l = L % (2 * d) < d ? L + d - L % d : L;
    int r = R % (2 * d) < d ? R - R % d - 1 : R;
    return l > r ? pair {0, -1} : pair {l / (2 * d) * d + (l - d) % (2 * d), r / (2 * d) * d + (r - d) % (2 * d)};
  };
  long long answer = numeric_limits<long long>::max();
  for (int d = 1; d < N; d++) {
    if (N % d == 0) {
      int N_even = N / (2 * d) * d + min(d, N % (2 * d)), N_odd = N / (2 * d) * d + max(0, N % (2 * d) - d);
      segment_tree st_even(N_even), st_odd(N_odd);
      long long answer_e = 0, answer_o = 0;
      for (int i = 0; i < N; i++) {
        for (auto [j1, j2, t] : rect[i]) {
          auto [j1_e, j2_e] = Even(j1, j2, d);
          auto [j1_o, j2_o] = Odd(j1, j2, d);
          st_even.update(j1_e, j2_e + 1, t);
          st_odd.update(j1_o, j2_o + 1, t);
        }
        int cnt_e = st_even.query(), cnt_o = st_odd.query();
        int r = (i / d) % 2;
        answer_o += (r ? cnt_e : N_even - cnt_e) + (!r ? cnt_o : N_odd - cnt_o);
        answer_e += (!r ? cnt_e : N_even - cnt_e) + (r ? cnt_o : N_odd - cnt_o);
      }
      answer = min({answer, answer_e, answer_o});
    }
  }
  cout << answer << "\n";
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 5948 KB Output is correct
2 Correct 11 ms 1628 KB Output is correct
3 Correct 37 ms 7296 KB Output is correct
4 Correct 25 ms 2396 KB Output is correct
5 Correct 41 ms 5468 KB Output is correct
6 Correct 25 ms 4444 KB Output is correct
7 Correct 6 ms 2140 KB Output is correct
8 Correct 25 ms 4480 KB Output is correct
9 Correct 71 ms 5600 KB Output is correct
10 Correct 34 ms 4952 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 26 ms 1372 KB Output is correct
17 Correct 37 ms 3672 KB Output is correct
18 Correct 92 ms 3676 KB Output is correct
19 Correct 572 ms 3724 KB Output is correct
20 Correct 677 ms 3732 KB Output is correct
21 Correct 34 ms 3672 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 78 ms 2156 KB Output is correct
24 Correct 79 ms 3732 KB Output is correct
25 Correct 16 ms 860 KB Output is correct
26 Correct 50 ms 2340 KB Output is correct
27 Correct 108 ms 3548 KB Output is correct
28 Correct 82 ms 3672 KB Output is correct
29 Correct 14 ms 1884 KB Output is correct
30 Correct 3 ms 604 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 5948 KB Output is correct
2 Correct 11 ms 1628 KB Output is correct
3 Correct 37 ms 7296 KB Output is correct
4 Correct 25 ms 2396 KB Output is correct
5 Correct 41 ms 5468 KB Output is correct
6 Correct 25 ms 4444 KB Output is correct
7 Correct 6 ms 2140 KB Output is correct
8 Correct 25 ms 4480 KB Output is correct
9 Correct 71 ms 5600 KB Output is correct
10 Correct 34 ms 4952 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 26 ms 1372 KB Output is correct
27 Correct 37 ms 3672 KB Output is correct
28 Correct 92 ms 3676 KB Output is correct
29 Correct 572 ms 3724 KB Output is correct
30 Correct 677 ms 3732 KB Output is correct
31 Correct 34 ms 3672 KB Output is correct
32 Correct 2 ms 348 KB Output is correct
33 Correct 78 ms 2156 KB Output is correct
34 Correct 79 ms 3732 KB Output is correct
35 Correct 16 ms 860 KB Output is correct
36 Correct 50 ms 2340 KB Output is correct
37 Correct 108 ms 3548 KB Output is correct
38 Correct 82 ms 3672 KB Output is correct
39 Correct 14 ms 1884 KB Output is correct
40 Correct 3 ms 604 KB Output is correct
41 Correct 893 ms 10740 KB Output is correct
42 Correct 155 ms 9660 KB Output is correct
43 Correct 463 ms 10652 KB Output is correct
44 Correct 149 ms 10944 KB Output is correct
45 Correct 74 ms 9808 KB Output is correct
46 Correct 972 ms 9660 KB Output is correct
47 Correct 72 ms 9308 KB Output is correct
48 Correct 292 ms 9456 KB Output is correct
49 Correct 147 ms 9296 KB Output is correct
50 Execution timed out 2074 ms 9188 KB Time limit exceeded
51 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 43 ms 5948 KB Output is correct
10 Correct 11 ms 1628 KB Output is correct
11 Correct 37 ms 7296 KB Output is correct
12 Correct 25 ms 2396 KB Output is correct
13 Correct 41 ms 5468 KB Output is correct
14 Correct 25 ms 4444 KB Output is correct
15 Correct 6 ms 2140 KB Output is correct
16 Correct 25 ms 4480 KB Output is correct
17 Correct 71 ms 5600 KB Output is correct
18 Correct 34 ms 4952 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 26 ms 1372 KB Output is correct
35 Correct 37 ms 3672 KB Output is correct
36 Correct 92 ms 3676 KB Output is correct
37 Correct 572 ms 3724 KB Output is correct
38 Correct 677 ms 3732 KB Output is correct
39 Correct 34 ms 3672 KB Output is correct
40 Correct 2 ms 348 KB Output is correct
41 Correct 78 ms 2156 KB Output is correct
42 Correct 79 ms 3732 KB Output is correct
43 Correct 16 ms 860 KB Output is correct
44 Correct 50 ms 2340 KB Output is correct
45 Correct 108 ms 3548 KB Output is correct
46 Correct 82 ms 3672 KB Output is correct
47 Correct 14 ms 1884 KB Output is correct
48 Correct 3 ms 604 KB Output is correct
49 Correct 893 ms 10740 KB Output is correct
50 Correct 155 ms 9660 KB Output is correct
51 Correct 463 ms 10652 KB Output is correct
52 Correct 149 ms 10944 KB Output is correct
53 Correct 74 ms 9808 KB Output is correct
54 Correct 972 ms 9660 KB Output is correct
55 Correct 72 ms 9308 KB Output is correct
56 Correct 292 ms 9456 KB Output is correct
57 Correct 147 ms 9296 KB Output is correct
58 Execution timed out 2074 ms 9188 KB Time limit exceeded
59 Halted 0 ms 0 KB -