[백준 14600번] 샤워실 바닥 갈기 (Small) (C++)

이미지 예시

#include<iostream>
using namespace std;
int num;
int map[4][4];
bool check(int x1, int y1, int x2, int y2) {
	for (int i = x1; i < x2; i++) {
		for (int j = y1; j < y2; j++) {
			if (map[i-1][j-1] != 0) return false;
		}
	}
	return true;
}
void tromino(int s, int x, int y, int& t) {
	if (s == 0) return;
	int size = (1 <<s-1);
	num++;
	if (check(x, y, x + size, y + size) == true) map[x + size - 2][y + size - 2] = num;
	if (check(x + size, y, x + 2 * size, y + size) == true) map[x + size-1][y + size - 2] = num;
	if (check(x, y + size, x + size, y + 2 * size) == true) map[x + size - 2][y + size-1] = num;
	if (check(x + size, y + size, x + 2 * size, y + 2 * size) == true) map[x + size-1][y + size-1] = num;
	tromino(s - 1, x, y, num);
	tromino(s - 1, x+size, y, num);
	tromino(s - 1, x, y + size, num);
	tromino(s - 1, x + size, y + size, num);
}
int main(void) {
	int k, m, n;
	cin >> k >> m >> n;
	map[m-1][n-1] = -1;
	int siz = (1 << k);
	tromino(k, 1, 1, num);
	for (int i = siz-1; i >= 0; i--, cout<<"\n") {
		for (int j = 0; j<siz; j++, cout << " ") cout << map[j][i];
	}
	return 0;
}