From 559a842e58e5ef1c4e6963780e036f0d4b857146 Mon Sep 17 00:00:00 2001
From: JHLEE325 <82587652+JHLEE325@users.noreply.github.com>
Date: Wed, 1 Oct 2025 09:15:11 +0900
Subject: [PATCH] =?UTF-8?q?[20251001]=20BOJ=20/=20G4=20/=20=EC=A0=84?=
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 =?UTF-8?q?=EC=9D=B4=EC=A4=80=ED=9D=AC?=
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---
 ...0\355\230\270 \353\252\251\353\241\235.md" | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 "JHLEE325/202510/01 BOJ G4 \354\240\204\355\231\224\353\262\210\355\230\270 \353\252\251\353\241\235.md"

diff --git "a/JHLEE325/202510/01 BOJ G4 \354\240\204\355\231\224\353\262\210\355\230\270 \353\252\251\353\241\235.md" "b/JHLEE325/202510/01 BOJ G4 \354\240\204\355\231\224\353\262\210\355\230\270 \353\252\251\353\241\235.md"
new file mode 100644
index 00000000..8a5f30b9
--- /dev/null
+++ "b/JHLEE325/202510/01 BOJ G4 \354\240\204\355\231\224\353\262\210\355\230\270 \353\252\251\353\241\235.md"	
@@ -0,0 +1,40 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st;
+        StringBuilder sb = new StringBuilder();
+
+        int T = Integer.parseInt(br.readLine());
+
+        for (int t = 0; t < T; t++) {
+            int n = Integer.parseInt(br.readLine());
+
+            String[] phone = new String[n];
+
+            for (int i = 0; i < n; i++) {
+                phone[i] = br.readLine();
+            }
+
+            Arrays.sort(phone);
+
+            boolean available = true;
+            for (int i = 0; i < n - 1; i++) {
+                if (phone[i + 1].startsWith(phone[i])) {
+                    available = false;
+                    break;
+                }
+            }
+
+            sb.append(available ? "YES\n" : "NO\n");
+        }
+
+        System.out.print(sb.toString());
+    }
+
+}
+```