High Level Algorithms Merge-Sort Split an array of integers into individual arrays and then sort them into a new array in ascending order. Most-Common Element Find the most common element(s) in an array and return it. Find Missing Element Was asked to solve this for a Fortune 500 company. Here is the solution using Most-Common-Element. Binary Search A Boolean function that tells you if an Int can be found in an array. Two Sum Problem A brute force solution to finding out whether there are two items in an array that add up to a provided sum.