Submission #378532

#	Time	Username	Problem	Language	Result	Execution time	Memory
378532		rk42745417	Chessboard (IZhO18_chessboard)	C++17	8 / 100	32 ms	620 KiB

chessboard

#include <bits/stdc++.h>
using namespace std;

using ll = int64_t;
using ull = uint64_t;
using uint = uint32_t;
using ld = long double;
const int MOD = 1e9 + 7;
const int INF = 0x3f3f3f3f;
const ll LINF = 2e18;
const double EPS = 1e-9;
#define EMT ios::sync_with_stdio(0); cin.tie(0);

bool prime_test(int n) {
	for(int i = 2; i < n; i++)
		if(n % i == 0)
			return false;
	return true;
}
void solve(int n) {
	int k;
	cin >> k;

}
void solve_2(int n) {
	int cnt[2] = {0}, k;
	cin >> k;
	for(int i = 0, a, b, c, d; i < k; i++) {
		cin >> a >> b >> c >> d;
		cnt[(a + b) % 2]++;
	}
	ll a = 1LL * n * n / 2, b = 1LL * n * n - a;
	cout << min(cnt[1] + b - cnt[0], cnt[0] + a - cnt[1]) << '\n';
}
signed main() { EMT
	int n;
	cin >> n;
	if(prime_test(n))
		solve_2(n);
	else
		solve(n);
}

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