这个…… 这个题看上去有点难的样子. 仔细看看,感觉有点简单.啊,是递归啊,正经的看一看,好像是把一个数分成2的几次方的和. 然后余数和比他小的最大的2的次方数如果不是2的一次方或者2的0次方,就继续递归. 仔细一想貌似很简单,只不过余数是在括号外面,商是在里面的,这种小事稍微写写就可以了. 直接代码吧,这题除了题意有点复杂以外还行…… #include<iostream> #include<cstdio> using namespace std; long long m; lon
Your task is to calculate ab mod 1337 where a is a positive integer and b is an extremely large positive integer given in the form of an array. Example1: a = 2 b = [3] Result: 8 Example2: a = 2 b = [1,0] Result: 1024 Credits:Special thanks to @Stomac
Given an integer (signed 32 bits), write a function to check whether it is a power of 4. Example: Given num = 16, return true. Given num = 5, return false. Follow up: Could you solve it without loops/recursion? Credits:Special thanks to @yukuairoy fo
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? Credits:Special thanks to @dietpepsi for adding this problem and creating all test cases. 这道题让我们判断一个数是不是3的次方数,在Le
Given an integer, write a function to determine if it is a power of two. Hint: Could you solve it in O(1) time and using O(1) space? 这道题让我们判断一个数是否为2的次方数,而且要求时间和空间复杂度都为常数,那么对于这种玩数字的题,我们应该首先考虑位操作 Bit Operation.在LeetCode中,位操作的题有很多,比如比如Repeated DNA Seque