Determine whether you can reduce all elements of nums to zero by repeatedly subtracting 1 from any contiguous subarray of length k. The core challenge is deciding feasibility of windowed decrements, typically solved with a left-to-right greedy that tracks cumulative range effects (difference/sliding-window) in O(n).
Use esses exemplos para entender em que contexto ela costuma cair e adaptar sua prática.
Given an array of length n and q queries, each query consisting of two indices [l, r], determine if it's possible to make all elements of the array zero by subtracting 1 from any subsequence within the range [l, r] for each query
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