diff --git a/JHLEE325/202601/24 BOJ G5 Contact.md b/JHLEE325/202601/24 BOJ G5 Contact.md
new file mode 100644
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+++ b/JHLEE325/202601/24 BOJ G5 Contact.md	
@@ -0,0 +1,56 @@
+```java
+import java.io.*;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int T = Integer.parseInt(br.readLine());
+
+        while (T-- > 0) {
+            String s = br.readLine();
+            if (isMatch(s)) System.out.println("YES");
+            else System.out.println("NO");
+        }
+    }
+
+    static boolean isMatch(String s) {
+        int state = 0;
+
+        for (char c : s.toCharArray()) {
+            int cur = c - '0';
+
+            if (state == 0) {
+                state = (cur == 0) ? 1 : 2;
+            } else if (state == 1) {
+                if (cur == 1) state = 0;
+                else return false;
+            } else if (state == 2) {
+                if (cur == 0) state = 3;
+                else return false;
+            } else if (state == 3) {
+                if (cur == 0) state = 4;
+                else return false;
+            } else if (state == 4) {
+                if (cur == 0) state = 4;
+                else state = 5;
+            } else if (state == 5) {
+                if (cur == 0) state = 6;
+                else state = 7;
+            } else if (state == 6) {
+                if (cur == 0) return false;
+                else state = 0;
+            } else if (state == 7) {
+                if (cur == 0) state = 8;
+                else state = 7;
+            } else if (state == 8) {
+                if (cur == 0) state = 4;
+                else state = 0;
+            }
+
+            if (state == -1) return false;
+        }
+
+        return state == 0 || state == 5 || state == 7;
+    }
+}
+```