Given an array of integers, this function will return the sum of all the odd numbers in the array.
Given an array of integers, this function finds the lowest positive integer that does not exist in the array. The array can contain duplicates and negative numbers.
Given an array A of n integers, find the maximum average value for a subarray of given length k.
Given an array of integers, this function will find the first missing positive integer and return it. The array can contain duplicates and negative numbers.
To find the sum of all elements in an array, simply iterate through the array and add each element to a total sum.
Given a string, the length of the longest substring without repeating characters is found.
Given an array of n integers, find the contiguous subarray of length k with the maximum sum.