Valid Parentheses — C# Coding Problem
Difficulty: easy | Category: stack
Problem Description
Given a string `s` containing just the characters `'('`, `')'`, `'{'`, `'}'`, `'['` and `']'`, determine if the input string is valid. An input string is valid if: - Open brackets are closed by the same type of brackets. - Open brackets are closed in the correct order. - Every close bracket has a corresponding open bracket of the same type.
Examples
Example 1
Input: s = "()"
Output: true
Example 2
Input: s = "()[]{}"
Output: true
Example 3
Input: s = "(]"
Output: false