Steady Shelf Stock

Count how many of a shelf's stock changes were at least a given minimum restock size.

A warehouse shelf records its daily stock changes. Each entry in the list is the change for one day - a positive number means stock was added, and a negative number means stock was sold. You are also given a minimum restock size. Count how many days had a change that was at least the minimum restock size. If there are no daily changes at all, return 0.