洛谷P1706 全排列问题

 

import java.util.Scanner;
public class Main {
   static int lable[]=new int[15];
   static int a[]=new int[15];
   static Scanner sc=new Scanner(System.in);
    static int depth =sc.nextInt();
   public static void print(int a[]){
       for (int i = 1; i <= depth; i++) {
           System.out.printf("%5d",a[i]);
       }
   }
   public static void dfs(int currentdepth){
       if(currentdepth>depth){
               print(a);
               System.out.println();
               return;
       }
 
       for (int i = 1; i <=depth; i++) {
           if(lable[i]==0){
           lable[i]=1;
           a[currentdepth]=i;
           dfs(currentdepth+1);
           lable[i]=0;
       }
   }
       return;
   }
   public static void main(String[] args) {
   dfs(1);
   }
}