2817 : 로또(Lotto)

import java.util.Arrays;
import java.util.Scanner;
 
public class Main {
 
    static int k;
    static int si[] = new int [51];
    static int arr[] = new int [101];
     
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scan = new Scanner(System.in);
         
        int i;
        k = scan.nextInt();
         
        for (i = 1; i <= k; i++) {
            si[i] = scan.nextInt();
        }
         
        Arrays.sort(si, 1, k);
         
         
        f(1, 1);
    }
 
    private static void f(int level, int s) {
        // TODO Auto-generated method stub
        int i;
        if (level > 6) {
            output();
            return;
        }
        for (i = s; i <= k; i++) {
            arr[level] = i;
            f(level + 1, i+1);
        }
    }
     
     
 
    private static void output() {
        int i;
        for (i = 1; i <= 6; i++) {
            System.out.printf("%d ", si[arr[i]]);
        }
        System.out.printf("\n");
    }
 
}

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