136. find median of two sorted array

medium - accepted / - tried

Given two sorted array of integers, please return the median.

median([1,2],[3,4,5])// 3

If there are even numbers, return the average.

median([1,2],[3,4])// 2.5

follow-up

What is the time & space cost of your approach? Could you do better?

Always try to find a better approach.