璨璨要好好学习

摘要： Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Not 阅读全文

摘要： Given an integer n, return the number of trailing zeroes in n!. Note: Your solution should be in logarithmic time complexity. 这道题首先要读懂题目。。。一开始连factori 阅读全文