Find Three Largest Numbers

Category: Searching

Difficulty: Easy

Description

Write a function that takes in an array of at least three integers and, without sorting the input array, returns a sorted array of the three largest integers in the input array.

The function should return duplicate integers if necessary; for example, it should return [10, 10, 12] for an input array of [10, 5, 9, 10, 12].

Sample Input

array = [141, 1, 17, -7, -17, -27, 18, 541, 8, 7, 7]

Sample Output

[18, 141, 541]

Optimal Space & Time Complexity

O(n) time | O(1) space - where n is the length of the input array