Source: https://www.algoexpert.io/questions/find-three-largest-numbers
Difficulty: easy
Category: Searching
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]