solves valid parantheses

Author: anishLearnsToCode

README.md

@@ -8,7 +8,7 @@
 | 9 | [PalindromeNumber](https://leetcode.com/problems/palindrome-number/) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/PalindromeNumber.java) |
 | 13 | [Roman To Integer](https://leetcode.com/problems/roman-to-integer/) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/RomanToInteger.java) |
 | 14 | [Longest Common Prefix](https://leetcode.com/problems/longest-common-prefix/) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/LongestCommonPrefix.java) |
-| 20 | [ValidParentheses](https://leetcode.com/problems/valid-parentheses/) | Easy | |
+| 20 | [ValidParentheses](https://leetcode.com/problems/valid-parentheses/) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/ValidParentheses.java) |
 | 2 | []() | Easy | |
 | 2 | []() | Easy | |
 | 2 | []() | Easy | |