摘要: Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Given a string, find the first non 阅读全文
posted @ 2017-06-23 01:13 Review->Improve 阅读(709) 评论(0) 推荐(0) 编辑
摘要: Given an integer, convert it to a roman numeral. The number is guaranteed to be within the range from 1 to 3999. Given an integer, convert it to a rom 阅读全文
posted @ 2017-06-23 00:50 Review->Improve 阅读(167) 评论(0) 推荐(0) 编辑
摘要: Given a roman numeral, convert it to an integer. The answer is guaranteed to be within the range from 1 to 3999. Given a roman numeral, convert it to 阅读全文
posted @ 2017-06-23 00:33 Review->Improve 阅读(176) 评论(0) 推荐(0) 编辑