Mastering array manipulations with techniques like prefix sum, sliding window, two pointers, and Kadane's algorithm.
Reviewing fundamentals of 1D and 2D arrays, including memory representation and traversal patterns.
Using prefix sums to answer range sum queries in O(1) time after an O(n) preprocessing step.
Solving problems involving contiguous subarrays by maintaining a 'window' of elements.
Using two pointers to iterate through an array for efficient searching and subarray processing.
Finding the maximum sum of a contiguous subarray in O(n) time.
Applying learned techniques to various subarray-related challenges (e.g., counting, specific sums).