Largest Number
描述
Given a list of non negative integers, arrange them such that they form the largest number.
For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330.
Note: The result may be very large, so you need to return a string instead of an integer.
分析
这题可以先把每个整数变成字符串，得到一个字符串数组，然后把这个数组按特定规则排个序，顺序输出即可。