arithmetic of random bit using gmp library?

[ikilobo]

i want to representation the large random bit to operate the arithmetic, like this

example
input n=10, then
10 random bit has create
A[]=[1011011100]
B[]=[0010010011]

i want to divide the array to any part like
A[]=[[10110],[11100]]
B[]=[[00100],[10011]]
_______________ ______xor (per block)
B[]=[[10010],[01111]]

how can i implementing it, using the gmp library

nb: n up to 1000 or more...

regard,