Doubt somewhere in the monotonic space?

#1

here in the monotonic space why is the start = arr[n-1] ,
it should be 0 .

#2

In this question you have to minimise the maximum number of pages read by a student. Start is taken as ar[n-1] because book at (n-1)th index with ar[n-1] pages must be allocated to some student. So there must a student who read atleast ar[n-1] pages. So our ans is always greater than or equal to ar[n-1].
you can start with 0 as well but your ans would also be greater than ar[n-1].

#3

why it is that the ans will be >=arr[n-1]

#4

@mehulbhandari358
If you allocate books in any order, there must be a student who receive (n-1)th book. So he must read atleast arr[n-1] pages . thus your ans can never be less than arr[n-1] since there is always 1 student who read a[n-1] pages. Your start can be 0 but ans will always be greater than arr[n-1].

#5

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