Solve problems that are commonly asked in C++ coding interviews related to common data structures.

Ace the C++ Coding Interview

Data structures are among the fundamentals of computer science and are often a core decision in developing efficient programs. They are categorized as a vital benchmark of computer science knowledge when it comes to industry interviews. This module contains a detailed review of common data structures in C++. We'll also become well-equipped with different data structures by implementing them.
By the end of this module, we'll have expertise in solving problems in data structures.

Data Structures

# Statement

Given a `queue` and a number `k`, reverse the order of the first `k` elements in `queue.`  If `k` is less than $0$, if `k` exceeds `queue` size, or if `queue` is empty, return NULL. Otherwise, return the modified `queue`.


**Constraints:**

- $0 \leq$ `queue.length` $\leq 10^{3}$
- $10^{-3} \leq$ `queue[i]` $\leq 10^{3}$
- $10^{-3} \leq$ `k` $\leq 10^{3}$

# Examples







 Try to solve the Reverse First k Elements of Queue problem.

Challenge: Reverse First k Elements of Queue

Try to solve the Reverse First k Elements of Queue problem.

Challenge 3: Reversing First k Elements of Queue

Statement