## Valid Parentheses ### Problem Statement Valid Parentheses is a fundamental problem in parsing and validating string input. Given a string of characters containing various types of parentheses (round, square, curly), determine if the string of parentheses is valid. A string of parentheses is valid if every opening parenthesis has a corresponding and matching closing parenthesis which is nested inside it in the correct order. The allowed pairs of parentheses are: `(` `)`, `[` `]`, and `{` `}`. ### Rules and Constraints * The input string is composed of only the three types of parentheses. * The string may be empty. * The solution must determine the validity of the string in O(n) time complexity, where n is the length of the input string. * The solution must use O(n) space complexity in the best case scenario, i.e., the string is empty or the parentheses are balanced. * The solution must return `true` if the string of parentheses is valid, and `false` otherwise. ### Input/Output Specifications * Input: A string of characters containing various types of parentheses. * Output: A boolean value indicating whether the string of parentheses is valid. ### Example **Input:** {"s":"()[]{}"} **Output:** true