熄灯问题POJ1222

// 熄灯问题POJ1222
#include 
#include 
using namespace std;

const int ROW = 5;
const int COL = 6;

void change(char lamp[], int row, int col) {
	if (row >= 0 && row < ROW && col >= 0 && col < COL)
		lamp[row] ^= (1 << col);
}

void press(char lamp[], int row, int col) {
	change(lamp, row, col); 
	change(lamp, row-1, col); 
	change(lamp, row+1, col); 
	change(lamp, row, col-1); 
	change(lamp, row, col+1); 
}

void pressline(char lamp[], int row, int bits) {
	for (int i = 0; i < COL; i++)
		if ((1 << i) & bits)
			press(lamp, row, i);
}

void input(char lamp[]) {
	for (int i = 0; i < ROW; i++) {
		lamp[i] = 0;
		for (int j = 0; j < COL; j++) {
			int n;
			cin >> n;
			if (n)
				lamp[i] |= 1 << j;
		}
	}
}

void output(char state[]) {
	for (int i = 0; i < ROW; i++) {
		for (int j = 0; j < COL; j++)
			if (state[i] & (1 << j))
				cout << "1 ";
			else
				cout << "0 ";
		cout << endl;
	}
}

void separator(char ch) {
	for (int i = 0; i < COL * 2 - 1; i++)
		cout << ch;
	cout << endl;
}

void process(char lamp[], char turn[]) {
	char light[ROW];
	memcpy(light, lamp, sizeof(char) * ROW);

	for (int i = 0; i < ROW; i++) {
		pressline(light, i, turn[i]);
		separator('-');
		output(light);
	}
}

bool solve(char lamp[], char turn[]) {
	for (int i = 0; i < (1 << COL); i++) {
		char light[ROW];
		memcpy(light, lamp, sizeof(char) * ROW);

		turn[0] = i;
		pressline(light, 0, i);
		for (int j = 1; j < ROW; j++) {
			turn[j] = light[j-1]; 
			pressline(light, j, turn[j]);
		}

		if (light[ROW-1] == 0)
			return true;
	}
	
	return false;
}

int main() {
	char lamp[ROW];
	char turn[ROW];

	freopen("熄灯问题.in", "r", stdin);
	
	input(lamp);
	output(lamp);
	
	solve(lamp, turn);
	#ifdef DEBUG
	process(lamp, turn);
	#endif
	
	separator('=');
	output(turn);
	
    return 0;
}