import java.util.*;
public class dfsFirst {
static boolean []v=new boolean[1005];
static int []a=new int [1005];
static int n;
static public void dfs(int c)
{
if(c==n)
{System.out.print(a[0]+" ");
for(int i=1;i<n;i++)
System.out.print(a[i]+" ");
System.out.println();
}
else
{
for(int i=1;i<=n;i++)
{
if(!v[i])
{v[i]=true;
a[c]=i;
dfs(c+1);
v[i]=false;
}
}
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
while(true)
{dfsFirst dfs=new dfsFirst();
int n=sc.nextInt();
System.out.println(n);
Arrays.fill(v, false);
Arrays.fill(a, 0);
dfsFirst.dfs(0);
}
}
}
主函数的n传不到dfs里面怎么办