Minimum Time to Complete All Deliveries

Description

You are given two integer arrays of size 2: d = [d1, d2] and r = [r1, r2].

Two delivery drones are tasked with completing a specific number of deliveries. Drone i must complete di deliveries.

Each delivery takes exactly one hour and only one drone can make a delivery at any given hour.

Additionally, both drones require recharging at specific intervals during which they cannot make deliveries. Drone i must recharge every ri hours (i.e. at hours that are multiples of ri).

Return an integer denoting the minimum total time (in hours) required to complete all deliveries.