C++ programming

Given an array of integers that range from 0 to n - 1 where n is the length of the array, return the value of the array that is repeated the most. If more than one value have the maximum frequency, return the minimum of the values. Given two arrays, return the number of values they have in common. Given a sorted array of integers and a nonnegative target value, return the number of pairs whose difference is equal to the target. Do not include pairs of the same element