I did not get the use of x nad y in this problem as in final we are using z to calculate using merge

#1

i did not get the use of x nad y in this problem as in final we are using z to calculate using merge

#2

hi @guptanikhil898,
See we have to find pairs, which means two elements.
Now there are three cases when we divide array into left and right:-

x = Case #1: Both elements lie in left array

y = Case #2: Both elements lie in right array

z = Case #3: One lie in left and second one lie in right array.
Please let me know if there is any other doubt.

#3

i am not able to understand how x and y are calculated recursively