摘要：
题目：Find the total area covered by tworectilinearrectangles in a2Dplane.Each rectangle is defined by its bottom left corner and top right corner as sho... 阅读全文
摘要：
题目：Given an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.提示：此题要求出n阶乘的结尾零的个数。因为当且仅当阶... 阅读全文