[BOJ] 15656 N과M 7 (S3)

Author: abcxj123

정건우/3주차/260114.java

@@ -0,0 +1,55 @@
+//https://www.acmicpc.net/problem/15656
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+import java.util.StringTokenizer;
+
+public class BOJ_S3_15656_N과M7 {
+    static int [] nums, picks;
+    static int N, M;
+    static StringBuilder sb;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+
+        nums = new int[N];
+        picks = new int[M];
+        sb = new StringBuilder();
+
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < N; i++) {
+            nums[i] = Integer.parseInt(st.nextToken());
+        }
+
+        Arrays.sort(nums);
+
+        perm(0);
+
+        System.out.println(sb.toString());
+
+    }
+
+    private static void perm(int depth) {
+        if (depth == M) {
+            for (int num : picks) {
+                sb.append(num).append(" ");
+            }
+
+            sb.setLength(sb.length()-1);
+            sb.append("\n");
+
+            return;
+        }
+
+        for (int i = 0; i < N; i++) {
+            picks[depth] = nums[i];
+            perm(depth + 1);
+        }
+
+    }
+}