摘要：
Description: Given an integer n, return 1 - n in lexicographical order. For example, given 13, return: [1,10,11,12,13,2,3,4,5,6,7,8,9]. Please optimiz 阅读全文
摘要：
Description: Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return tru 阅读全文