What's New?

October 2026

  • Generalized Abbreviation

    New

    Bit Manipulation · Coding Question

    Generate every valid abbreviation of a word, where non-adjacent substrings are replaced by their lengths (LeetCode #320).

    Harvey

  • Most Stones Removed with Same Row or Column

    New

    Graphs · Coding Question

    Find the most stones you can remove when a stone can only go if another shares its row or column (LeetCode #947).

    Harvey

  • Palindrome Permutation II

    New

    Recursion · Coding Question

    Return every distinct palindrome that can be formed by rearranging the characters of a string (LeetCode #267).

    Harvey

  • Maximum Path Quality of a Graph

    New

    Graphs · Coding Question

    Find the highest-value path that starts and ends at node 0 within a time limit, counting each visited node once (LeetCode #2065).

    Harvey

  • Build Span Trees

    New

    Trees · Coding Question

    Rebuild trace trees from a flat list of spans and their parent ids, and return each span with its depth.

    Harvey

  • Group Employees by Interests

    New

    Graphs · Coding Question

    Group employees who share an interest, directly or through a chain of colleagues, and return every group.

    Harvey

  • Prefix String Removal

    New

    Tries · Coding Question

    Remove every string that is a prefix of another string in the list, keeping the rest in their original order.

    Harvey

  • Maximum Profit Triplet

    New

    Arrays & Hashing · Coding Question

    Pick three items in index order with strictly increasing prices so that their combined profit is as large as possible.

    Harvey

  • N-Queens

    New

    Recursion · Coding Question

    Place n queens on an n×n board so that none attack each other, and return every valid layout (LeetCode #51). Asked at Visa, Snowflake and 10 more companies.

    Harvey

  • API User List

    PremiumNew

    React · Coding Question

    Eoin

September 2026

July 2026