Valid Parentheses Coding | Dataford Interview Questions

FloQast Close can represent checklist and workflow expressions using grouped delimiters. Given a string containing only (), [], and {}, determine whether every opening delimiter is closed by the correct type in the correct order.

A string is valid when each opening delimiter has a matching closing delimiter, delimiters are closed in last-in, first-out order, and no closing delimiter appears without a corresponding opening delimiter.

Formal Specification

Implement is_valid_parentheses(s), which accepts a string s and returns a boolean. Return True if the delimiters are valid, otherwise return False.

Constraints

1 <= len(s) <= 10^4
s contains only parentheses, square brackets, and curly braces
The input may be invalid

Function Signature

def is_valid_parentheses(s):

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