How to split ad impressions for a certain period?

Question

Algorithms

The site displays ads to authorized users.
The purchase of advertising is carried out for a certain period.
During this period, all impressions must be sold.
Let's say an advertiser buys 50,000 impressions for 7 days.
Within 7 days it is necessary to realize 50k impressions evenly, but for the first 1 day do not set any restrictions on the display, the subsequent remaining impressions must be shown within 6 days and also divide the number of impressions evenly during the day.
I don’t understand how to implement this, please help, direct, suggest.
It is necessary to implement on the puff.

Answer 1

Is it difficult to calculate (50000 - shown on the first day) divided by 6 or what?...