Submission #92932

#	Time	Username	Problem	Language	Result	Execution time	Memory
92932		Makhsud	Chessboard (IZhO18_chessboard)	C++17	0 / 100	74 ms	376 KiB

chessboard

#include <bits/stdc++.h>
#define ll long long

ll n, k, x, y, xx, yy;
ll d;

using namespace std;

int main()
{
	cin >> n >> k;
	for ( int i = 1; i <= k; i ++ )
		cin >> x >> y >> xx >> yy;
	for ( int i = n-1; i >= 1; i -- ) {
		if ( n % i == 0 ) {
			d = i;
			break;
		}
	}
	if ( d == 1 ) {
		cout << (n*n) / 2;
	}
	else {
		ll cnt = 0;
		bool ch = false;
		for ( int i = 1; i <= n; i += d ) {
			ch = !ch;
			if ( ch ) {
				cnt += ( n / d ) / 2;
			}
			else {
				cnt += ( n / d + 1 ) / 2;
			}
		}
		cout << cnt  * (d*d);
	}
}

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