Comparison Required Using DNC

I can’t understand
what is ceil(3n/2) and floor and what is

T(n) = T(floor(n/2)) + T(ceil(n/2)) + 2

T(2) = 1

T(1) = 0

I can’t understand how to solve the below problem
what is ceil(3n/2) and floor and what is

The number of comparisons required to find maximum and minimum in the given array of n- element using divide and conquer:

ciel(3n/2)

ciel(3n/2)+2

floor(3n/2)

floor(3n/2)-2

I don’t understand how is your query related to the tiling problem - II

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