Doubt in the code for decreasing order

#1
  1. what is a and what is b?
  2. can we represent a[0] as a?
#2

hello @pmschhabra
a)
a and b in comparator are any two numbers of the array and we are deciding their order
using logic defined inside comparator (i.e which should come first in array).

b) a is base address of array and a[0] will have same address.
so u can write a[0] as *a.

#3

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