Buses in a Bustling Town

Problem Overview

• Compute minutes since the last bus departure given a list of departure times and the current time.
• Input: departure times and current time; Output: minutes since the most recent past departure, or -1 if none; a bus at the current time has not departed.
• Real-world context: tracking a bustling town bus schedule to know how long ago the last bus left.
• From Meta interviews; a coding interview problem and common interview question.