array

A Python solution using Kadane's algorithm to find the maximum sum of a contiguous subarray

A Python backtracking solution to Combination Sum using a start index and pruning

A 3Sum solution using sorting and a two-sum-style hash map approach.

A left-product and right-product solution for Product of Array Except Self.

Using a set to count each consecutive sequence only from its starting point

Using frequency counting and bucket arrays to return the top k frequent elements

Comparing brute force, two-pass hash map, and one-pass hash map approaches for Two Sum

Comparing brute force, sorting, and hash set approaches for duplicate detection