[20250209] BOJ / 골드3 / 디스크 트리 / 권혁준

khj20006/202502/09 BOJ G3 디스크 트리.md

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+```java
+
+import java.util.*;
+import java.io.*;
+
+class Node{
+    String name;
+    TreeMap<String, Node> subs;
+    Node(String name){
+        this.name = name;
+        subs = new TreeMap<String, Node>();
+    }
+}
+
+class Trie{
+    Node root;
+    Trie(){
+        root = new Node("ROOT");
+    }
+}
+
+class Main {
+
+	// IO field
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	static StringTokenizer st;
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+	static long nextLong() {return Long.parseLong(st.nextToken());}
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+
+	// Additional field
+	static Trie trie;
+	static int N;
+
+	public static void main(String[] args) throws Exception {
+
+		ready();
+		solve();
+
+		bwEnd();
+	}
+
+	static void ready() throws Exception{
+
+        N = Integer.parseInt(br.readLine());
+        trie = new Trie();
+
+	}
+
+	static void solve() throws Exception{
+
+		while(N-- > 0){
+		    String line = br.readLine();
+		    String[] dirs = line.split("\\\\");
+		    Node cur = trie.root;
+		    for(String dir : dirs){
+		        if(!cur.subs.containsKey(dir)) cur.subs.put(dir, new Node(dir));
+		        cur = cur.subs.get(dir);
+		    }
+
+		}
+
+		print(trie.root, -1);
+
+	}
+
+	static void print(Node cur, int dep) throws Exception{
+	    if(dep >= 0){
+    	    for(int i=0;i<dep;i++) bw.write(" ");
+    	    bw.write(cur.name + "\n");
+	    }
+	    for(String key : cur.subs.keySet()){
+	        Node val = cur.subs.get(key);
+	        print(val, dep+1);
+	    }
+	}
+
+}
+
+```