diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..5748016
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,33 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "谷歌浏览器", //运行html文件，用谷歌浏览器打开
+      "type": "chrome",
+      "request": "launch",
+      "url": "${file}",
+      "sourceMaps": true,
+      "webRoot": "${workspaceRoot}"
+    },
+    {
+      "name": "nodeLauch", //单独调试js，即可以直接运行js
+      "type": "node",
+      "request": "launch",
+      "program": "${file}", //这个配置成你要调试的文件、${file}当前打开的文件
+      "stopOnEntry": false,
+      "args": [],
+      "cwd": "${workspaceRoot}",
+      "runtimeExecutable": null,
+      "runtimeArgs": [
+        "--nolazy"
+      ],
+      "env": {
+        "NODE_ENV": "development"
+      },
+      "console": "internalConsole",
+      "preLaunchTask": "",
+      "sourceMaps": false,
+      "outDir": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/.babelrc b/leetcode/.babelrc
similarity index 100%
rename from .babelrc
rename to leetcode/.babelrc
diff --git a/.gitignore b/leetcode/.gitignore
similarity index 100%
rename from .gitignore
rename to leetcode/.gitignore
diff --git a/README.md b/leetcode/README.md
similarity index 84%
rename from README.md
rename to leetcode/README.md
index 978fcd2..e523219 100644
--- a/README.md
+++ b/leetcode/README.md
@@ -17,4 +17,5 @@
 - [Reverse Integer](https://github.com/Z6T/leetcode/blob/master/src/easy/lesson2.js) | 007 整数反转
 - [Palindrome Number](https://github.com/Z6T/leetcode/blob/master/src/easy/lesson3.js) | 009 回文数
 - [Roman to Integer](https://github.com/Z6T/leetcode/blob/master/src/easy/lesson4.js) | 013 罗马数字转整数
-- [Longest Common Prefix](https://github.com/Z6T/leetcode/blob/master/src/easy/lesson5.js) | 014 最长公共前缀
\ No newline at end of file
+- [Longest Common Prefix](https://github.com/Z6T/leetcode/blob/master/src/easy/lesson5.js) | 014 最长公共前缀
+- [Valid Parentheses](https://github.com/Z6T/leetcode/blob/master/src/easy/lesson6.js) | 020 有效的括号
\ No newline at end of file
diff --git a/package.json b/leetcode/package.json
similarity index 100%
rename from package.json
rename to leetcode/package.json
diff --git a/src/easy/lesson1.js b/leetcode/src/easy/lesson1.js
similarity index 100%
rename from src/easy/lesson1.js
rename to leetcode/src/easy/lesson1.js
diff --git a/src/easy/lesson2.js b/leetcode/src/easy/lesson2.js
similarity index 100%
rename from src/easy/lesson2.js
rename to leetcode/src/easy/lesson2.js
diff --git a/src/easy/lesson3.js b/leetcode/src/easy/lesson3.js
similarity index 100%
rename from src/easy/lesson3.js
rename to leetcode/src/easy/lesson3.js
diff --git a/src/easy/lesson4.js b/leetcode/src/easy/lesson4.js
similarity index 100%
rename from src/easy/lesson4.js
rename to leetcode/src/easy/lesson4.js
diff --git a/src/easy/lesson5.js b/leetcode/src/easy/lesson5.js
similarity index 100%
rename from src/easy/lesson5.js
rename to leetcode/src/easy/lesson5.js
diff --git a/leetcode/src/easy/lesson6.js b/leetcode/src/easy/lesson6.js
new file mode 100644
index 0000000..ba461dd
--- /dev/null
+++ b/leetcode/src/easy/lesson6.js
@@ -0,0 +1,43 @@
+/**
+给定一个只包括 '('，')'，'{'，'}'，'['，']' 的字符串，判断字符串是否有效。
+
+有效字符串需满足：
+
+左括号必须用相同类型的右括号闭合。
+左括号必须以正确的顺序闭合。
+注意空字符串可被认为是有效字符串。
+
+示例 1:
+
+输入: "()"
+输出: true
+示例 2:
+
+输入: "()[]{}"
+输出: true
+示例 3:
+
+输入: "(]"
+输出: false
+示例 4:
+
+输入: "([)]"
+输出: false
+示例 5:
+
+输入: "{[]}"
+输出: true
+
+ * @param {string} s
+ * @return {boolean}
+ */
+
+export default s => {
+  let len = s.length/2
+  for(var i = 0 ;i< len;i++){
+     s= s.replace("[]",'');
+      s= s.replace("()",'');
+      s= s.replace("{}",'');
+  }
+  return s?false:true
+};
diff --git a/test/easy/lesson1.test.js b/leetcode/test/easy/lesson1.test.js
similarity index 100%
rename from test/easy/lesson1.test.js
rename to leetcode/test/easy/lesson1.test.js
diff --git a/test/easy/lesson2.test.js b/leetcode/test/easy/lesson2.test.js
similarity index 100%
rename from test/easy/lesson2.test.js
rename to leetcode/test/easy/lesson2.test.js
diff --git a/test/easy/lesson3.test.js b/leetcode/test/easy/lesson3.test.js
similarity index 100%
rename from test/easy/lesson3.test.js
rename to leetcode/test/easy/lesson3.test.js
diff --git a/test/easy/lesson4.test.js b/leetcode/test/easy/lesson4.test.js
similarity index 100%
rename from test/easy/lesson4.test.js
rename to leetcode/test/easy/lesson4.test.js
diff --git a/test/easy/lesson5.test.js b/leetcode/test/easy/lesson5.test.js
similarity index 100%
rename from test/easy/lesson5.test.js
rename to leetcode/test/easy/lesson5.test.js
diff --git a/leetcode/test/easy/lesson6.test.js b/leetcode/test/easy/lesson6.test.js
new file mode 100644
index 0000000..284fed4
--- /dev/null
+++ b/leetcode/test/easy/lesson6.test.js
@@ -0,0 +1,8 @@
+import fun from '../../src/easy/lesson6'
+
+test('should reverse', () => {
+  expect(fun("([)]")).toEqual(false)
+})
+test('should reverse', () => {
+  expect(fun("()[]{}")).toEqual(true)
+})
\ No newline at end of file