Implement a Queue using an array to handle the following types of queries:
You need to implement the push and pop functions. The rest of the program will handle the input and output operations.
Example 1
Input: Queries = 2 1 5 2 2
Output: -1 5 -1
Explanation: 2: Pop from an empty queue ?
Output: -1 ? Queue: . 1 5: Push 5 into the queue ? Queue: {5}. 2: Pop and print the front element (5) ? Queue: . 2: Pop from an empty queue ?
Output: -1
Example 2
Input: Queries = 1 10 1 20 2 1 30 2 2
Output: 10 20 30
Explanation: 1 10: Push 10 into the queue ? Queue: {10}. 1 20: Push 20 into the queue ? Queue: {10, 20}. 2: Pop and print the front element (10) ? Queue: {20}. 1 30: Push 30 into the queue ? Queue: {20, 30}. 2: Pop and print the front element (20) ? Queue: {30}. 2: Pop and print the front element (30) ? Queue:
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