4981: Collatz Conjecture 时间限制: 6 Sec  内存限制: 128 MB提交: 213  解决: 23[提交][状态][讨论版][命题人:admin] 题目描述 In 1978 AD the great Sir Isaac Newton, whilst proving that P is a strict superset of N P, defined the Beta Alpha Pi Zeta function f as follows over any seq…

考拉兹猜想(英语:Collatz conjecture),又称为奇偶归一猜想.3n+1猜想.冰雹猜想.角谷猜想.哈塞猜想.乌拉姆猜想或叙拉古猜想,是指对于每一个正整数,如果它是奇数,则对它乘3再加1,如果它是偶数,则对它除以2,如此循环,最终都能够得到1. 1.编写一个Collatz函数 def collatz(number): if number % 2 == 0: return number / 2 else: return 3 * number + 1 2.让用户输入一个整数并不断调用这个…

dir /b 就是ls -f的效果 1057 -- FILE MAPPING_web_archive.7z 2007 多校模拟 - Google Search_web_archive.7z 2083 -- Fractal_web_archive.7z 2663 -- Tri Tiling_web_archive.7z 3款重复文件查找清理软件(Windows_Mac_Linux) _ 穆童博客_web_archive.7z 404 - 找不到文件或目录._web_archive.7z acm h…

A - Amsterdam Distance 题意:极坐标系,给出两个点,求最短距离 思路:只有两种方式,取min  第一种,先走到0点,再走到终点 第二种,走到同一半径,再走过去 #include <bits/stdc++.h> using namespace std; #define INF 0x3f3f3f3f const double PI = acos(-1.0); double n, m, r; double n1, m1, n2, m2; inline double work1(…

译文:Python高级特性(1):Iterators.Generators和itertools [译注]:作为一门动态脚本语言,Python 对编程初学者而言很友好,丰富的第三方库能够给使用者带来很大的便利.而Python同时也能够提供一些高级的特性方便用户使用更为复杂的数据结构.本系 列文章共有三篇,本文是系列的第一篇,将会介绍迭代器.生成器以及itertools模块的相关用法.由于作者 Sahand Saba 列举的示例中有诸多专业的数学相关内容,因此翻译中有诸多不妥之处请大家指出,非常感谢…

A Amsterdam Distance 题意 求圆环上的两点距离. 分析 显然是沿半径方向走到内圈再走圆弧最短. 代码 #include <bits/stdc++.h> using namespace std; double m,n,r,sx,sy,tx,ty; const double pi=acos(-1.0); int main(){ scanf("%lf%lf%lf%lf%lf%lf%lf",&m,&n,&r,&sx,&sy…

Array 数组 Array concatenation (数组拼接) 使用 Array.concat() ,通过在 args 中附加任何数组 和/或 值来拼接一个数组. const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); // ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]] Array difference (数组比较) 根据数组 b 创建一个 Set 对象,然后在…

使用分组 修改minon的ID,做一个标识 [root@node2 ~]# vim /etc/salt/minionmaster: 172.25.254.130 id: web1 #node2[root@node2 ~]# systemctl restart salt-minion [root@node3 ~]# vim /etc/salt/minionmaster: 172.25.254.130 id: web2 #node3 [root@node3 ~]# vim /etc/salt/min…

 Goldbach's Conjecture Time Limit:1000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Submit Status Description In 1742, Christian Goldbach, a German amateur mathematician, sent a letter to Leonhard Euler in which he made the following…

Twin Prime Conjecture                                            Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)                                            Total Submission(s): 1898    Accepted Submission(s): 592 P…

1.Link: http://poj.org/problem?id=2262 http://bailian.openjudge.cn/practice/2262 2.Content: Goldbach's Conjecture Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 37791   Accepted: 14536 Description In 1742, Christian Goldbach, a German a…

http://poj.org/problem?id=2262 Goldbach's Conjecture Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 34323   Accepted: 13169 Description In 1742, Christian Goldbach, a German amateur mathematician, sent a letter to Leonhard Euler in whic…

Problem Description Goldbach's Conjecture: For any even number n greater than or equal to 4, there exists at least one pair of prime numbers p1 and p2 such that n = p1 + p2. This conjecture has not been proved nor refused yet. No one is sure whether…

def collatz(num,i): i =i + 1 if num%2 == 0: return collatz(num//2,i) elif num == 1: return i else: return collatz((num+(num<<1) + 1),i) k = 0 j = 0 for i in range(666666,1000000): temp = collatz(i,0) if k < temp: j,k = i,temp print(j,k) print(j,k…

Goldbach's Conjecture Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5277    Accepted Submission(s): 2022点我 Problem Description Goldbach's Conjecture: For any even number n greater than or equa…

It was proposed by Christian Goldbach that every odd composite number can be written as the sum of a prime and twice a square. 9 = 7 + 21215 = 7 + 22221 = 3 + 23225 = 7 + 23227 = 19 + 22233 = 31 + 212 It turns out that the conjecture was false. What…

The following iterative sequence is defined for the set of positive integers: n n/2 (n is even) n 3n + 1 (n is odd) Using the rule above and starting with 13, we generate the following sequence: 13 40 20 10 5 16 8 4 2 1 It can be seen that this seque…

title: The following iterative sequence is defined for the set of positive integers: n n/2 (n is even) n 3n + 1 (n is odd) Using the rule above and starting with 13, we generate the following sequence: 13 40 20 10 5 16 8 4 2 1 It can be seen that thi…

POJ 2262 Goldbach's Conjecture(素数相关) http://poj.org/problem?id=2262 题意: 给你一个[6,1000000]范围内的偶数,要你将它表示成两个素数相加和的形式.假设存在多组解,请输出两个素数差值最大的解. 分析: 首先我们用素数筛选法求出100W以内的全部素数. 筛选法求素数可见: http://blog.csdn.net/u013480600/article/details/41120083 对于给定的数X,假设存在素数a+素数b…

题目大意:给一个偶数,判断是否是两个素数的和. 先用sieve方法生成一个素数表,然后再进行判断即可. #include <cstdio> #include <vector> #include <bitset> using namespace std; typedef vector<int> vi; typedef long long ll; #define MAXN 1000000 vi primes; bitset<MAXN+> bs; vo…

Twin Prime Conjecture Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2950    Accepted Submission(s): 1016 Problem Description If we define dn as: dn = pn+1-pn, where pi is the i-th prime. It i…

[LightOJ1259]Goldbach`s Conjecture(数论) 题面 Vjudge T组询问,每组询问是一个偶数n 验证哥德巴赫猜想 回答n=a+b 且a,b(a<=b)是质数的方案个数 题解 筛出质数后直接暴力判断就行了 质数密度没有那么大,记得节约空间 #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath>…

http://www.math.purdue.edu/about/purview/spring95/conjecture.html A Layman's Perspective of Abhyankar's Conjecture by Ganapathy Sundaram Consider a polynomial in two variables X and Y. This can be treated as a polynomial of degree n in Y, whose coeff…

题目链接: https://cn.vjudge.net/problem/POJ-2262 题目描述: In 1742, Christian Goldbach, a German amateur mathematician, sent a letter to Leonhard Euler in which he made the following conjecture: Every even number greater than 4 can be written as the sum of t…

1622:Goldbach’s Conjecture 时间限制: 1000 ms         内存限制: 524288 KB [题目描述] 原题来自:Ulm Local,题面详见:POJ 2262 哥德巴赫猜想:任何大于 44 的偶数都可以拆成两个奇素数之和. 比如: 8=3+5 20=3+17=7+13 42=5+37=11+31=13+29=19+23 你的任务是:验证小于 106 的数满足哥德巴赫猜想. [输入] 多组数据,每组数据一个 n. 读入以 0 结束. [输出] 对于每组数据…

题目链接:http://ac.jobdu.com/problem.php?pid=1440 详解链接:https://github.com/zpfbuaa/JobduInCPlusPlus 参考代码: // // 1440 Goldbach's Conjecture.cpp // Jobdu // // Created by PengFei_Zheng on 12/04/2017. // Copyright © 2017 PengFei_Zheng. All rights reserved. /…

Goldbach`s Conjecture Goldbach's conjecture is one of the oldest unsolved problems in number theory and in all of mathematics. It states: Every even integer, greater than 2, can be expressed as the sum of two primes [1]. Now your task is to check whe…

poj2262 Goldbach's Conjecture 用欧拉筛把素数筛出来,再枚举一下. #include<iostream> #include<cstdio> #include<cstring> #define re register using namespace std; #define N 1000001 int n,v[N],pri[N],cct; bool is[N]; int main(){ ;i<N;++i){ ; ;j<=cct;++…

Twin Prime Conjecture Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description If we define dn as: dn = pn+1-pn, where pi is the i-th prime. It is easy to see that d1 = 1 and dn=even for n>1. Twin Prime…

这是 meelo 原创的 IEEEXtreme极限编程大赛题解 Xtreme 10.0 - Goldbach's Second Conjecture 题目来源 第10届IEEE极限编程大赛 https://www.hackerrank.com/contests/ieeextreme-challenges/challenges/goldbachs-second-conjecture An integer p > 1 is called a prime if its only divisors ar…