Submission #338387

#	Time	Username	Problem	Language	Result	Execution time	Memory
338387		boykut	Chessboard (IZhO18_chessboard)	C++14	16 / 100	32 ms	2412 KiB

chessboard

#include <bits/stdc++.h>

using namespace std;

#define int long long

signed main() {
   ios::sync_with_stdio(0);
   cin.tie(0);
   int n, k;
   cin >> n >> k;
   if (k == 0) {
      int ans = -1;
      for (int i = 2; i <= n; i++) {
         if (n % i == 0) {
            int m = n / i;
            
            int res = ((n*n) / (m*m)) / 2 * (m *m);
            
            if (ans == -1 || ans > res)
               ans = res;
         }
      }
      cout << ans << '\n';
   } else {
      int cnt[] = {0, 0};
      for (int i = 0, x, y; i < k; i++) {
         cin >> x >> y >> x >> y;
         cnt[(x+y)%2]++;
      }
      if (n == 2) {
         cout << 2 - max(cnt[0], cnt[1]);
      } else {
         cout << min(n*n/2+1-cnt[0]+cnt[1], n*n/2-cnt[1]+cnt[0]);
      }
   }
   return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 23
• Subtask 6: 0 / 30