933. Number of Recent Calls https://leetcode.com/problems/number-of-recent-calls
622. Design Circular Queue https://leetcode.com/problems/design-circular-queue
641. Design Circular Deque https://leetcode.com/problems/design-circular-deque
1670. Design Front Middle Back Queue https://leetcode.com/problems/design-front-middle-back-queue
2073. Time Needed to Buy Tickets https://leetcode.com/problems/time-needed-to-buy-tickets
Prerequisites
Before reading this article, you need to learn:
The common focus of queue problems is the "First-In-First-Out" order property of elements. For example, maintaining certain temporal properties of elements within the queue. Below are some example problems where the queue acts as a "sliding window."
