Question 1198389
.


As it is worded, printed and presented in the post, the problem is posed incorrectly.


To be correct, the problem must say in the description, 
that the number of free services that they want to provide is 15.


Without it, the problem can not be solved properly.



It is not for the first time this problem comes to the forum in this form,
and I just reacted on it in similar way earlier.