수 이어쓰기 (#77)

Author: asqwklop12

pr/수 이어쓰기/Main.java

@@ -0,0 +1,59 @@
+import java.util.*;
+
+public class Main {
+
+    static int n;
+    static int max = Integer.MIN_VALUE;
+    static List<Integer> list;
+    static List<Integer> maxList;
+
+    public static void main(String[] args) {
+
+        Scanner sc = new Scanner(System.in);
+
+        n = sc.nextInt();
+
+        solve();
+
+    }
+
+    public static void solve() {
+        first(n);
+
+        System.out.println(max);
+
+        for (int num : maxList) {
+            System.out.print(num + " ");
+        }
+    }
+
+    public static void first(int n) {
+        // 두번째 수 구하기
+        for (int i = 1; i <= n; i++) {
+            list = new ArrayList<>();
+            list.add(n);
+            list.add(i);
+            dfs(n, i);
+        }
+
+    }
+
+    public static void dfs(int before, int current) {
+
+        int next = before - current;
+
+        if (next < 0) {
+            if (max < list.size()) {
+                max = list.size();
+                maxList = new ArrayList<>(list);
+            }
+            return;
+        }
+
+        // 세번째 수 ~ ?번째수까지 구하기
+        list.add(next);
+        dfs(current, next);
+
+    }
+
+}