Topic: queue-problem / Level: beginner

• 101. Write a program to find the minimum element in a queue.
• 102. Write a program to implement a queue using pointers.
• 103. Write a program to check if the queue is a valid palindrome after ignoring spaces.
• 104. Write a program to merge three queues into one.
• 105. Write a program to find the sum of all even numbers in a queue.
• 106. Write a program to find the average of all elements in a queue.
• 107. Write a program to find the length of the longest consecutive sequence in a queue.
• 108. Write a program to determine if a queue is empty after multiple enqueue and dequeue operations.
• 109. Write a program to calculate the factorial of a number using a queue.
• 110. Write a program to generate the first n prime numbers using a queue.
• 111. Write a program to find the maximum sum of contiguous subarray using a queue.
• 112. Write a program to remove all elements less than a specified value from a queue.
• 113. Write a program to rotate a queue clockwise by k elements.
• 114. Write a program to rotate a queue counterclockwise by k elements.
• 115. Write a program to implement a double-ended queue (deque) using arrays.
• 116. Write a program to find the total number of distinct elements in a queue.
• 117. Write a program to implement a priority queue using an array.
• 118. Write a program to find the kth largest element in a queue.
• 119. Write a program to find the kth smallest element in a queue.
• 120. Write a program to implement a queue with two stacks.
• 121. Write a program to implement a queue using a linked list with sentinel nodes.
• 122. Write a program to find the most recent n items in a queue.
• 123. Write a program to print the elements of a queue at odd positions.
• 124. Write a program to find the intersection of two queues.
• 125. Write a program to reverse the order of elements in a queue using two stacks.
• 126. Write a program to implement a queue for managing tasks in a to-do list.
• 127. Write a program to simulate a printer queue with priorities.
• 128. Write a program to implement a simple web crawler using a queue.
• 129. Write a program to determine the maximum size of the queue during enqueue and dequeue operations.
• 130. Write a program to implement a restaurant waiting list using a queue.
• 131. Write a program to check if a queue can be represented as a binary search tree.
• 132. Write a program to determine the number of operations required to sort a queue.
• 133. Write a program to implement a queue that supports resizing.
• 134. Write a program to print the frequency of each element in a queue.
• 135. Write a program to simulate a call center using a queue.
• 136. Write a program to find the first repeated element in a queue.
• 137. Write a program to find the maximum element in a queue using O(n) time complexity.
• 138. Write a program to check if two queues are equal in terms of order and elements.
• 139. Write a program to find the average of all numbers in a queue.
• 140. Write a program to check if a queue is a subset of another queue after sorting.
• 141. Write a program to find the last element in a queue.
• 142. Write a program to implement a function that rotates the queue.
• 143. Write a program to implement a queue that can store strings.
• 144. Write a program to check if the sum of elements in a queue is even or odd.
• 145. Write a program to remove every other element from a queue.
• 146. Write a program to implement a queue using a doubly linked list.
• 147. Write a program to find the maximum sum of n consecutive elements in a queue.
• 148. Write a program to check if the queue contains duplicates.
• 149. Write a program to find the position of an element in a queue.
• 150. Write a program to simulate a video game lobby using a queue.

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• Intermediate
• Advanced