[백준] 6603번 로또

https://www.acmicpc.net/problem/6603

6603번: 로또

 

import java.util.*;
import java.io.*;

public class Main {

    public static int n;
    public static int arr[];
    public static boolean[] visit;
    // 로또 6개 케이스
    public static int ans[] = new int[6];

    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int count = 0;
        while(true){
            StringTokenizer st = new StringTokenizer(br.readLine());
            n = Integer.parseInt(st.nextToken());
            if(n == 0) {
           		break;
            } else {
                arr = new int[n];
                visit = new boolean[n];
                for(int i = 0 ; i < n; i++) {
                	arr[i] = Integer.parseInt(st.nextToken());
                }
                dfs(0, 0);
                System.out.println("");
            }
        }
    } 

    public static void dfs(int start, int depth) {
        // 로또 6개 케이스
        if(depth == 6) {
            for(int val : ans) {
            	System.out.print(val + " ");
            }
            System.out.println("");
            return;
        }

        for(int i = start; i < n; i++) {
            if(!visit[i]) {
                visit[i] = true;
                ans[depth] = arr[i];
                dfs(i + 1 , depth + 1);
                visit[i] = false;
            }
        }

    }
}