1. Regular Expression Matchinghistorical

    Regular expression matching with support for . and *.

  2. Binary Search Upper Boundhistorical

    LeetCode notes on binary-search upper bound.

  3. Longest Substring Without Repeating Charactershistorical

    Find the longest substring without repetition using a brute-force set approach and a sliding window.

  4. Find First and Last Position of Element in Sorted Arrayhistorical

    LeetCode notes on finding the first and last position of an element in a sorted array.

  5. Evaluate Divisionhistorical

    Use weighted union-find to evaluate division relationships between variables.

  6. Counting Bitshistorical

    Count the number of 1 bits in every integer from 0 through num.

  7. Hamming Distancehistorical

    Compute the Hamming distance between two integers using bitwise operations.

  8. Binary Search Upper Boundhistorical

    LeetCode notes on binary-search upper bound.

  9. Reverse Integerhistorical

    Reverse the decimal digits of a 32-bit signed integer and handle overflow.

  10. Find First and Last Position of Element in Sorted Arrayhistorical

    LeetCode notes on finding the first and last position of an element in a sorted array.