How Tall Did It Get?

The block tower rose and fell all afternoon — what was its proudest moment? 🧱

You get commands (add:x or take, takes always valid). Print the TALLEST the pile ever got.

Example:

Input: commands = ["add:a", "add:b", "take", "add:c", "add:d", "add:e", "take"] Output: 4

Tracking height after every command: 1, 2, 1, 2, 3, 4, 3 — the tallest the pile ever reaches is 4.