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Data Structures for Coding Interviews in Python

Solution: Reverse First k Elements of Queue

Explore how to reverse the first k elements in a queue by leveraging stack operations in Python. Understand the method to use a stack for reversing while preserving the order of other elements, and learn the time and space complexities involved in the solution.

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Statement

Given a queue and a number k, reverse the order of the first k elements in queue. If k is less than 00, if k exceeds queue size, or if queue is empty, return NULL. Otherwise, return the modified queue.

Constraints:

  • 0≤0 \leq queue.length ≤103\leq 10^{3}
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