Algorithm Interview: Make the Largest Number

Hi, here's your problem today. This problem was recently asked by Uber:

Given a number of integers, combine them so it would create the largest number.

Example:
Input: [17, 7, 2, 45, 72]
Output: 77245217

def largestNum(nums):

  # Fill this in.



print largestNum([17, 7, 2, 45, 72])

# 77245217