How do I slide the window in code?
By subtracting the value of the element that just left the left side of the window, and adding the value of the element that just entered the right side.
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More FAQs in Simulating Sliding Windows with a Single Loop
It is an algorithmic pattern that involves creating a 'window' over a subset of an array or string, and sliding it across the data to perform calculations efficiently.
Nested loops recalculate overlapping data repeatedly, causing O(N*K) time complexity. Sliding window maintains the state and only calculates the changes, achieving O(N).
Problems involving contiguous subarrays or substrings, such as finding the max sum of K elements, or the longest substring without repeating characters.
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