Valid Parentheses and Linked Lists | Dataford Interview Questions

Solve a problem involving valid parentheses and a linked list, and explain your approach step by step.

Implement is_valid_parentheses_list(head), where head is the first node of a singly linked list and each node contains one bracket character: (, ), [, ], {, or }. Return True when the sequence is valid and balanced, otherwise return False. An empty list is valid. Each node has value and next fields.

Constraints

0 <= number of nodes <= 1000
Each node value is one of (, ), [, ], {, or }
The input is a singly linked list
The list may be empty

Function Signature

def is_valid_parentheses_list(head):

Your question is Valid Parentheses and Linked Lists. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Solve a problem involving valid parentheses and a linked list, and explain your approach step by step.

Constraints

0 <= number of nodes <= 1000
Each node value is one of (, ), [, ], {, or }
The input is a singly linked list
The list may be empty

Function Signature

def is_valid_parentheses_list(head):

Your question is Valid Parentheses and Linked Lists. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.