Merge Sort

Given three sorted arrays $A,B$ & $C$ of sizes $N,M,$&$P$ respectively. Write a

program to merge the three sorted arrays in to a single array that must be in

increasing order.

Input Format: $$

The first line contains an integer $(N),$ size of $A.$

The second line contains $N$ space separated integers for array $A.$

The third line contains an integer $(M),$ size of $B.$

The fourth line contains $M$ space separated integers for array B$.$

The fifth line contains an integer $(P),$ size of $C.$

The sixth line contains $P$ space separated integers for array $C.$

Output Format:

Return an array that is the result of three sorted arrays in cpp