Summarize to the Power of Two time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output A sequence a1,a2,…,ana1,a2,…,an is called good if, for each element aiai, there exists an element ajaj (i≠ji≠j…

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 (that is, 2d2d for some non-negative integer dd). For example, the following sequences are good: [5…

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…

D. Power Products You are given n positive integers a1,-,an, and an integer k≥2. Count the number of pairs i,j such that 1≤i<j≤n, and there exists an integer x such that ai⋅aj=xk. Input The first line contains two integers n and k (2≤n≤105, 2≤k≤100).…

D. Fibonacci-ish time limit per test 3 seconds memory limit per test 512 megabytes input standard input output standard output Yash has recently learnt about the Fibonacci sequence and is very excited about it. He calls a sequence Fibonacci-ish if th…

题意 题解 枚举每一个可能的二进制数.扔到一个map里 再枚举每一个可能的三进制数看map有没有就行了 反正就是很水 #include<iostream> #include<cstring> #include<cstdio> #include<cmath> #include<algorithm> #include<map> using namespace std; map<long long,bool>ma; ],s2[]…

这个周末“山竹 ”强势来袭!很多人的目光都在关注暴力水果“山竹”,这个号称70年最强最大风力超17级 台风“山竹”今天就已经在小悦家窗台肆虐咆哮了一天了!不知其他的小伙伴们是不是好好的一个周末就只能被拘泥在家刷着朋友圈,听“山竹”肆虐的咆哮呼号.......而小悦在家里闲着无聊,心血来潮,随即打开了电脑,想做一个关于超强台风“山竹”的数据分析,借助Power BI 来实现对台风的各种想象. 超强台风“山竹”即将冲进南海 首先给大家普及下“台风”相关知识,台风数据从中央气象台风网获取,山竹正是“超…

今天,我们来简单聊一聊“地图”. 在我们日常生活中,地图地位已经提升的越来越高,出门聚餐.驾驶.坐车.旅行......应运而生的就是各种Map APP. 作为数据分析师,我们今天不讲生活地图,要跟大家叨叨的当然是我们最关心的是:怎样选择合适的Power BI的可视化“地图”.本文主要介绍10种地图的优缺点,其中有四个本地地图可以直接在Power BI Desktop中访问,而无需导入它们.有四个自定义视觉效果可供导入,还有两个属于“自己创建”的. 1. 原生—ESRI ArcGIS地图 ArcG…

Let the light guide us Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 62768/32768 K (Java/Others) Total Submission(s): 677    Accepted Submission(s): 226 Problem Description Plain of despair was once an ancient battlefield where those brave…

//B. Delete from the Left #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <set> #include <map> #include <vector> using namespace std; const int inf=0x3f3f3f3f; ; char a[N],b[…