N-ary Tree Preorder Traversal - Solution & Explanation

This approach leverages the simplicity of recursion to perform a preorder traversal on an n-ary tree. We start at the root node, then recursively process each child's subtree.

The C code defines a node structured to represent each tree node with value and children. Using a helper function, preorderHelper, it ensures the tree is traversed in preorder by accessing each node's value before recursively calling the helper on each child.

This approach uses an explicit stack to simulate the call stack of recursion. We manually manage traversals seen in recursion, starting from the root node, iteratively processing each node, then adding each child to a stack for future visits.

This C solution uses a stack structure to handle the iterative traversal. The stack manually manages nodes left to process, with each node added to the result upon visitation. It handles children in reverse order to maintain correct preorder evaluation.