You are presented with two arrays, all containing positive integers. One of the arrays will have one extra number: Your task is to create a function that returns the missing number. [1,2,3] and [1,2,3,4] should return 4. [4,66,7] and [66,77,7,4] should return 77. How would you go about this?
Should I use OpenCV 2.4.13 or OpenCV 3.1.0?