The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the primes below two million. 译文: 10以下的素数之和为17,求出2000000以下的素数之和. ======================= 第一次code: import java.util.Scanner; public class Main { public static void main(String[]…

是我算法不对,还是笔记本CPU太差? 我优化了两次,还是花了三四个小时来得到结果. 在输出上加1就是最终结果. The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the primes below two million. def isprime(n): boolisprime = True for i in xrange(3,n): if n % i == 0: boolisprime = Fals…

The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the primes below two million. #include<stdio.h> #include<math.h> #include<stdbool.h> #define N 2000000 bool prim(int n) { int i; ; i*i<=n; i++) { ) return false…

def primeslist(max): ''' 求max值以内的质数序列 ''' a = [True]*(max+1) a[0],a[1]=False,False for index in range(2, len(a)): if a[index]==True: for i in range(index+index,len(a),index): a[i]=False return [i for i, j in enumerate(a) if j==True] temp = primeslist…

本题来自 Project Euler 第10题:https://projecteuler.net/problem=10 # Project Euler: Problem 10: Summation of primes # The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. # Find the sum of all the primes below two million. # Answer: 142913828922 def f(x):…

题意: 001(Multiples of 3 and 5):对小于1000的被3或5整除的数字求和. 002(Even Fibonacci numbers):斐波那契数列中小于等于4 000 000的偶数求和. 003(Largest prime factor):求600 851 475 143的最大质因数. 004(Largest palindrome product):求由两个三位数相乘得到的最大回文数. 005(Smallest multiple):求能被1~20中所有数整除的最小正整数.…

Summation of primes Problem 10 The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the primes below two million. The code resemble : import math limit = 2000000 crosslimit = int(math.sqrt(limit)) #sieve = [False] * limit sieve =…

PE 中文翻译 最喜欢做这种很有意思的数学题了虽然数学很垃圾 但是这个网站的提交方式好鬼畜啊qwq 1.Multiples of 3 and 5 直接枚举 2.Even Fibonacci numbers 直接枚举 3.Largest prime factor $\sqrt(n)$枚举 #include<cstdio> #include<vector> #include<set> #include<algorithm> #define sit #define…

欢迎访问我的新博客:http://www.milkcu.com/blog/ 原文地址:http://www.milkcu.com/blog/archives/uva10168.html 原创:Summation of Four Primes - PC110705 作者:MilkCu 题目描述 Summation of Four Primes   Waring's prime number conjecture states that every odd integer is either pri…

Summation of Four Primes Input: standard input Output: standard output Time Limit: 4 seconds Euler proved in one of his classic theorems that prime numbers are infinite in number. But can every number be expressed as a summation of four positive prim…