diff --git "a/week2/2. \354\230\254\353\260\224\353\245\270 \352\264\204\355\230\270/Solution.java" "b/week2/2. \354\230\254\353\260\224\353\245\270 \352\264\204\355\230\270/Solution.java"
deleted file mode 100644
index 2150163..0000000
--- "a/week2/2. \354\230\254\353\260\224\353\245\270 \352\264\204\355\230\270/Solution.java"	
+++ /dev/null
@@ -1,7 +0,0 @@
-/*
-    2. 올바른 괄호
-    https://programmers.co.kr/learn/courses/30/lessons/12909
-*/
-public class Solution {
-
-}
\ No newline at end of file
diff --git "a/week2/2. \354\230\254\353\260\224\353\245\270 \352\264\204\355\230\270/Solution2_2.java" "b/week2/2. \354\230\254\353\260\224\353\245\270 \352\264\204\355\230\270/Solution2_2.java"
new file mode 100644
index 0000000..a20377c
--- /dev/null
+++ "b/week2/2. \354\230\254\353\260\224\353\245\270 \352\264\204\355\230\270/Solution2_2.java"	
@@ -0,0 +1,51 @@
+import java.util.Map;
+
+/*
+    2. 올바른 괄호
+    https://programmers.co.kr/learn/courses/30/lessons/12909
+*/
+public class Solution2_2 {
+    public static void main(String[] args) {
+
+        String s = "(()(";
+
+        System.out.println(solution(s));
+
+    }
+
+    public static boolean solution(String s) {
+
+        int stack = 0;
+
+        if (s.charAt(0) == ')') {
+            return false;
+        }
+
+        for (char c : s.toCharArray()) {
+
+            switch (c) {
+                case '(':
+
+                    stack += 1;
+
+                    break;
+
+                case ')':
+
+                    stack -= 1;
+
+                    if (stack < 0) {
+                        return false;
+                    }
+
+                    break;
+
+                default:
+                    break;
+            }
+
+        }
+
+        return stack == 0 ? true : false;
+    }
+}
\ No newline at end of file