codeforces 1005-C. Summarize to the Power of Two(打表+暴力) http://codeforces.com/problemset/problem/1005/C 题目大意: 如果一个数组中,存在着这个数不管加上数组中其他任何数,其和都不是2的次幂,那么这个数就需要删除,问这个数组中需要删除多少个这样的数。 解题思路: 数据的范围是1e
A sequence a1,a2,…,an is called good if, for each element ai, there exists an element aj (i≠j) such that ai+aj is a power of two (that is, 2d for some non-negative integer d). For example, the following sequences are good: [5,3,11] (for example, for a1=5 we can ...
[16][16] (fora1=16a1=16, it is impossible to find another elementajaj such that their sum is a power of two), [4,16][4,16] (fora1=4a1=4, it is impossible to find another elementajaj such that their sum is a power of two), [1,3,2,8,8,8][1,3,2,8,8,8] (fora3=2...
The problem wants you to determine whether it is possible to transform one string into another by swapping letters at a certain distance. You are given two strings of equal length and a number k. You can swap any two letters in the first string if their positions differ by k or k+1. ...
Summarize to the Power of Two(map+思维) A sequence a1,a2,…,ana1,a2,…,an is called good if, for each element aiai, there exists an element ajaj (i≠ji≠j) such that ai+ajai+aj is a power of two #include i++ 2d 预处理 微信 转载 mb5fe94b3e552d9 2018-08-01 17:24:...
codeforces 1005-C. Summarize to the Power of Two(打表+暴力) http://codeforces.com/problemset/problem/1005/C题目大意: 如果一个数组中,存在着这个数不管加上数组中其他任何数,其和都不是2的次幂,那么这个数就需要删除,问这个数组中需要删除多少个这样的数。解题思路: 数据的范围是1e9,那么2的次幂...