2017年2月27日
441. 硬币楼梯 Arranging Coins
摘要： You have a total of n coins that you want to form in a staircase shape, where every k-th row must have exactly k coins.Given n, find the total number of full staircase rows that can be formed.n is a n... 阅读全文
posted @ 2017-02-27 22:58 xiejunzhao 阅读(137) 评论(0) 推荐(0)