Is It Even There?

The sorted warehouse ledger is a million lines long — the boss just wants yes or no. 📦

You get a SORTED list of nums and a target. Print yes if it's in the list, no if not — with the split-in-half strategy, not a full scan.

Example:

Input: nums = [3, 8, 12, 20, 31], target = 12 Output: yes

Splitting the range in half repeatedly narrows the search straight down to 12.