我是个傻*

#include <iostream>
#include <string.h>
#include <cstdio>
#include <algorithm>
using namespace std;
#define LL long long
int n , a[15];
bool l[15];
inline void print()
{
	for (int i = 0 ; i < n ; ++i)
	{
		putchar(a[i] + 48);
		putchar(32);
	} 
	putchar(10);
}
void f(int m)
{
	if (m == n)
	{
		print();
		return;
	}
	for (int i = 1 ; i <= n ; ++i)
	{
		if (l[i])
			continue;
		l[i] = 1;
		a[m] = i;
		f(m + 1);
		l[i] = 0;
	}
	return;
}
int main()
{
	memset(l , 0 , sizeof(l));
	cin >> n;
	f(0);
	return 0;
}