81. merge sorted arrays

easy - accepted / - tried

You are given a list of sorted non-descending integer arrays, write a function to merge them into one sorted non-descending array.

merge(  [    [1,1,1,100,1000,10000],    [1,2,2,2,200,200,1000],    [1000000,10000001],    [2,3,3]  ])

What is time complexity of your solution?

Always try to find a better approach.