Array Topics

Explore popular array problems and patterns to master your DSA skills.

•   01 Two Sum Classic problem: find two numbers that sum to target
•   02 Maximum Subarray Sliding window/Kadane's algorithm to find max contiguous sum
•   03 Product of Array Except Self Prefix/suffix product array without using division
•   04 Container With Most Water Two-pointer technique to maximize area between lines
•   05 Trapping Rain Water Compute trapped water using stack/two-pointer techniques

WONDERING, HOW DOES IT COVER PATTERNS?
This set of problems covers most array-related patterns asked in FAANG interviews:

Two Sum → Hashing, complement, pair sum problem.
Maximum Subarray → Sliding window / Kadane’s algorithm, contiguous subarray sum.
Product of Array Except Self → Prefix/suffix product, space optimization.
Container With Most Water → Two-pointer approach for optimization.
Trapping Rain Water → Stack, two-pointer technique, and elevation map problem.

Together, they ensure you understand sliding window, two-pointer, prefix-suffix, hash-based search, and stack patterns in arrays.