Submission #395271

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
395271	2021-04-28 04:47:20	rama_pang	Chessboard (IZhO18_chessboard)	C++17	100 / 100	542 ms	4372 KiB

chessboard

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#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0), cout.tie(0);
  int n, k;
  cin >> n >> k;
  vector<array<int, 4>> rect;
  for (int i = 0; i < k; i++) {
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    a--, b--, c--, d--;
    rect.push_back({a, b, c, d});
  }
  auto Solve = [&](int s) -> long long {
    long long res = 1ll * (n / s) * (n / s) / 2 * s * s;
    if (n / s % 2 == 1) {
      res += 1ll * s * s;
    }
    auto CountCorner = [&](int sx, int sy, int ex, int ey) -> long long {
      if (sx > ex || sy > ey) return 0;
      assert(sx / s == ex / s && sy / s == ey / s);
      if ((sx / s + sy / s) & 1) {
        return +1ll * (ex - sx + 1) * (ey - sy + 1);
      } else {
        return -1ll * (ex - sx + 1) * (ey - sy + 1);
 
 
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• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 23 / 23
• Subtask 6: 30 / 30