제출 #684194

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
684194		mychecksedad	Chessboard (IZhO18_chessboard)	C++17	16 / 100	93 ms	2392 KiB

chessboard

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define pb push_back
#define all(x) x.begin() x.end()
#define MOD (1e9+7)
const int N = 1e6;

ll n, k, ans = 1e18;
vector<array<int, 4>> vv;
void solve(){
	cin >> n >> k;
	int a = 0;
	for(int i = 0; i < k; ++i){
		int x1, x2, y1, y2; cin >> x1 >> y1 >> x2 >> y2;
		vv.pb({x1-1,y1-1,x2-1,y2-1});
	}
	for(ll i = 1; i < n; ++i){
		if(n % i == 0){
			for(int rep = 0; rep < 2; ++rep){
				ll c = 0;
				i *= 2;
				ll ii = i/2;
				for(auto v: vv){
					ll up = (v[0] + i - 1) / i * i - v[0];
					ll down = v[2] - (v[2] / i * i - 1);

					if(down == i) down = 0;
					
					if((v[0] + i - 1) / i * i > v[2]) up = v[2] - v[0] + 1, down = 0;
					
					ll left = (v[1] + i - 1) / i * i - v[1];
					ll right = v[3] - (v[3] / i * i - 1);
					
					if(right == i) right = 0;
					
					if((v[1] + i - 1) / i * i > v[3]) left = v[3] - v[1] + 1, right = 0;

					up -= 2 * (up % ii);
					down -= 2 * (down % ii);
					left -= 2 * (left % ii);
					right -= 2 * (right % ii);

					ll val = up * left - up * right + down * right - down * left;
					
					if(!rep) c -= val;
					else c += val;
					// cout << down << ' ' << up << ' ' << left << ' ' << right << '\n';
				}
				i /= 2;
				ans = min(ans, c + (rep ? (n/i)*(n/i)/2*i*i : ((n/i)*(n/i) + 1)/2*i*i));
			}

		}
	}
	cout << ans;
}

int main(){
	solve();
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

chessboard.cpp: In function 'void solve()':
chessboard.cpp:13:6: warning: unused variable 'a' [-Wunused-variable]
   13 |  int a = 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