Hi all,

I've troubles solving this task:

INPUT:
File with airplanes specifications:
- name of airplane
- cost for rental/day
- consumption - $/day
- speed
- range of flight
- consumption of start
- consumption of landing
- recovery time
- load capacity

Network of airports:
- distance between each two of them
- limitation on weight of airplanes which can land here
- airport fee
- initial placement of airplanes on the airports

File of orders:
- from when, from where
- until when, to where
- how many we will get paid
- weight of cargo

TASK:
Find the best possible plan of transport - to maximalise our profit.

Does anybody have any idea?

Thank you.