[Week03] BOJ 6603: 로또

weekly/week03/BOJ_6603_로또/JAEHEE25.java

@@ -0,0 +1,46 @@
+import java.util.*;
+import java.lang.*;
+import java.io.*;
+
+class Main {
+    static StringBuilder sb = new StringBuilder();
+    static int k;
+    static int[] numbers;
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        while (true) {
+            String input = br.readLine();
+
+            if (input.charAt(0) == '0') {
+                break;
+            }
+
+            StringTokenizer st = new StringTokenizer(input);
+            k = Integer.parseInt(st.nextToken());
+            numbers = new int[k];
+            for (int i = 0; i < k; i++) {
+                numbers[i] = Integer.parseInt(st.nextToken());
+            }
+
+            int[] result = new int[6]; //6개 숫자
+            backtracking(0, 0, result);
+            sb.append("\n");
+        }
+        System.out.println(sb);
+    }
+
+    static void backtracking(int depth, int start, int[] result) {
+        if (depth == 6) { //결과 출력
+            for (int i = 0; i < 6; i++) {
+                sb.append(result[i]).append(" ");
+            }
+            sb.append("\n");
+            return;
+        }
+
+        for (int i = start; i < k; i++) {
+                result[depth] = numbers[i];
+                backtracking(depth + 1, i + 1, result);
+        }
+    }
+}