Coding Problems Blog Pricing

Loading...

Helping engineers land their dream jobs at top tech companies through real-world interview prep and 1-on-1 mentorship.

Twitter GitHub LinkedIn

Platform

Blog
Coach Interview AI
Mock Interview AI
DS and Coding
Pricing

Resources

Coding Problems
System Design
About

Contact

Support
Sales
Billing
Press / Marketing

Legal

Privacy Policy
Terms of Service
Refund Policy

© 2026 DevMentor. All rights reserved.

Built with Next.js, Prisma, and Clerk.

For the best coding experience, use a desktop browser.

Easy

String

Valid Palindrome

After converting to lowercase and removing non-alphanumeric characters, determine if the string is a palindrome.

Examples

Input: s = "A man, a plan, a canal: Panama"

Output: true

Sample Test Cases

Case 1 Input: "A man, a plan, a canal: Panama"

Expected: true

Case 2 Input: "race a car"

Expected: false

Loading editor...

Case 1 Input: "A man, a plan, a canal: Panama"

Expected: true

Case 2 Input: "race a car"

Expected: false