Largest Number
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.
python code：
class Solution:
# @param num, a list of integers
# @return a string
def largestNumber(self, num):
num=[str(x) for x in num]
num.sort(cmp=lambda x, y: cmp(y+x, x+y)) #字符串按ascii排序即可
return ‘‘.join(num).lstrip(‘0‘) or ‘0‘ #输出时不显示左边的0
leetcode Largest Number python
原文：http://www.cnblogs.com/bthl/p/4574532.html