30 Essential Queue Programs in C

These programs cover fundamental queue operations with verified GeeksforGeeks links.
# Program Name Description Resources
1 Queue Implementation (Array) Basic queue using array with enqueue/dequeue GeeksforGeeks
2 Queue Implementation (Linked List) Queue using linked list implementation GeeksforGeeks
3 Circular Queue Implement circular queue using array GeeksforGeeks
4 Double Ended Queue (Deque) Implement deque with insert/delete from both ends GeeksforGeeks
5 Priority Queue (Array) Basic priority queue implementation GeeksforGeeks
6 Queue using Two Stacks Implement queue using two stacks GeeksforGeeks
7 Stack using Queues Implement stack using two queues GeeksforGeeks
8 Reverse a Queue Reverse elements of a queue GeeksforGeeks
9 Reverse First K Elements Reverse first k elements of queue GeeksforGeeks
10 Interleave Queue Halves Interleave first half with second half GeeksforGeeks
11 Level Order Tree Traversal Binary tree BFS using queue GeeksforGeeks
12 Breadth-First Search (BFS) Graph BFS implementation using queue GeeksforGeeks
13 Generate Binary Numbers 1 to N Generate binary numbers using queue GeeksforGeeks
14 LRU Cache Implementation Least Recently Used cache using queue GeeksforGeeks
15 Sort Queue without Extra Space Sort queue using queue operations only GeeksforGeeks
16 Sliding Window Maximum Maximum of all subarrays of size k GeeksforGeeks
17 Circular Petrol Pump Tour Find starting petrol pump for circular tour GeeksforGeeks
18 Rotten Oranges Problem Minimum time to rot all oranges (BFS) GeeksforGeeks
19 First Negative in Window First negative integer in every window of size k GeeksforGeeks
20 Distance of Nearest Cell with 1 Distance to nearest 1 in binary matrix GeeksforGeeks
21 Check Queue Sortable with Stack Check if queue can be sorted using stack GeeksforGeeks
22 FCFS CPU Scheduling First-Come-First-Serve CPU scheduling GeeksforGeeks
23 Zigzag Tree Traversal Zigzag level order traversal using queue GeeksforGeeks
24 Circular Queue Operations Complete circular queue implementation GeeksforGeeks
25 Queue Reversal using Recursion Reverse queue using recursion GeeksforGeeks
26 Deque Implementation Complete deque operations (front & rear) GeeksforGeeks
27 Priority Queue Operations Insert, delete, get max/min in priority queue GeeksforGeeks
28 Queue Size & Empty Check Implement queue size and isEmpty functions GeeksforGeeks
29 Queue using Circular Array Efficient queue using circular array GeeksforGeeks
30 Multiple Queue in Single Array Implement multiple queues in one array GeeksforGeeks
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