cKK

摘要： Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive.Example:Given nums = [-2, 0, 3, -5, 2, -1]sumRang... 阅读全文

摘要： /*Given an integer, write a function to determine if it is a power of three.Follow up:Could you do it without using any loop / recursion?*/public clas... 阅读全文