/*
Name：八皇后（DFS回溯）

Actor：HT

Time：2015年6月21日

Error Reporte:

}
*/

#include"stdio.h"
#include"iostream"
#include"string.h"

using namespace std; 

#define N 8

int sum;

int _amap[2 * N + 1] = { 0 };
int _bmap[2 * N + 1] = { 0 };
//int _xmap[N + 1] = { 0 };
int _ymap[N + 1] = { 0 };

int bigmap[N];					//写着玩

void set(int x, int y, int i)
{
	_ymap[y] = i;
	_amap[y - x + N] = i;
	_bmap[y + x - 1] = i;

	bigmap[x] = y;				//写着玩
}

void print()					//写着玩
{
	int i, j;
	for (i = 1; i <= N; i++)
	{
		for (j = 1; j <= N; j++)
		{
			if (bigmap[i] == j) cout << " * ";
			else cout << " . ";
		}
		cout << endl;
	}
}

void dfs(int x)
{
	if (x == N+1)
	{
		sum++;
		print();			//写着玩
		cout << endl;		//写着玩
	}
	int i;
	for (i = 1; i <= N; i++)
	{
		if (_amap[i - x + N] == 1 || _bmap[i + x - 1] == 1 || _ymap[i] == 1) continue;
		set(x, i, 1);
		dfs(x + 1);
		set(x, i, 0);
	}
}

int main()
{
	sum = 0;
	dfs(1);
	cout << sum << endl;
	system("pause");
}