摘要:
Given an integer, convert it to a roman numeral.Input is guaranteed to be within the range from 1 to 3999.罗马数字是由字符I,V,X,L,C,D,M等等表示的,其中I = 1;V = 5;X =... 阅读全文
摘要:
Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpoints of ... 阅读全文