Given an integer num, return a string representing its hexadecimal representation. For negative integers, two’s complement formatting is used.

All letters in the returned hexadecimal string must be lowercase, and the string must not contain any leading zeros unless the number itself is $0$.

Constraints:

• $-2^{31} \leq$ num $\leq 2^{31} - 1$

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.