uploaded at 2023. 1. 2. 오후 11:25:50

programmers/모음 사전/solution.java

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+// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/84512?language=java
+
+import java.lang.StringBuilder;
+import java.util.*;
+class Solution {
+    PriorityQueue<String> q = new PriorityQueue<>();
+    StringBuilder sb = new StringBuilder();
+    char[] oo = {'A','E','I','O','U'};
+    private String[] dfs(int depth){
+        String[] sa;
+        ArrayList<String> al = new ArrayList<>();
+        if(depth == 1){
+            al.clear();
+            for(char c : oo){
+                al.add(c+"");
+                q.add(c+"");
+            }
+            return al.stream().toArray(String[]::new);
+        }
+        if(depth >= 2){
+            al.clear();            
+            sa = dfs(depth-1);
+            for(String s : sa){
+                for(char c : oo){
+                    al.add(s+c);
+                    q.add(s+c);
+                }
+            }
+            return al.stream().toArray(String[]::new);
+        }
+        return null;
+    }
+    public int solution(String word) {
+        int answer = 0;
+        Arrays.toString(dfs(5));
+        String[] ans = q.stream().toArray(String[]::new);
+        Arrays.sort(ans);
+        return Arrays.asList(ans).indexOf(word)+1;
+    }
+}