Given the root of a binary tree, your task is to return a list containing the values of its nodes in preorder traversalIn preorder traversal, we visit each node by first visiting the current node, then its left subtree, and finally its right subtree order.

Constraints:

• The number of nodes in the tree is in the range $[0, 100]$.

• $-100 \leq$ node.data $\leq 100$

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.