Submission #501866

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
501866	2022-01-04 17:35:20	NachoLibre	Chessboard (IZhO18_chessboard)	C++17	100 / 100	839 ms	4488 KiB

chessboard

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#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(), (x).end()
using namespace std;
ll Fw(ll n, ll m, int w) {
  return n / w * m / w / 2 * w * w;
}
ll Fb(ll n, ll m, int w) {
  return n * m - Fw(n, m, w);
}
ll B(ll n, ll m, int w, int x = 0, int y = 0) {
  if(x / w + y / w & 1)
  return Fb(n, m, w);
  return Fw(n, m, w);
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  #ifdef wambule
  freopen("untitledfile.txt", "r", stdin);
  #endif
  ll n;
  int k;
  cin >> n >> k;
  vector<array<int, 4>> v;
  for(int i = 0; i < k; ++i) {
 
 
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Compilation message (stderr)

chessboard.cpp: In function 'long long int B(long long int, long long int, int, int, int)':
chessboard.cpp:15:11: warning: suggest parentheses around '+' in operand of '&' [-Wparentheses]
   15 |  if(x / w + y / w & 1)
      |     ~~~~~~^~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 23 / 23
• Subtask 6: 30 / 30