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Question: Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. Analysis： 给出一个整数，将它转换成罗马数字。 注意：保 阅读全文
posted @ 2016-02-25 22:01
江湖小妞
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Question: Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and e 阅读全文
posted @ 2016-02-25 12:50
江湖小妞
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Question: A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or righ 阅读全文
posted @ 2016-02-25 12:45
江湖小妞
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