Smith Numbers Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 14521 Accepted: 4906 Description While skimming his phone directory in 1982, Albert Wilansky, a mathematician of Lehigh University,noticed tha…
def reduceNum(n): '''题目:将一个正整数分解质因数.例如:输入90,打印出90=2*3*3*5''' print '{} = '.format(n), : print 'Please input a valid number !' exit() elif n ] : print '{}'.format(n) ] : # 循环保证递归 , n + ) : : n /= index # let n equal to it n/index : # This is the point…
下面是四种用java语言编程实现的求最大公约数的方法: package gcd; import java.util.ArrayList; import java.util.List; public class gcd { public static void main(String[] args) { long startTime; long endTime; long durationTime; int[] testArray1 = new int[]{784, 988, 460, 732,…
题目链接:http://codeforces.com/gym/101981/attachments 题意: 令 $mul(l,r) = \prod_{i=l}^{r}a_i$,且 $fac(l,r)$ 代表 $mul(l,r)$ 的不同素因子个数.求 $\sum_{i=1}^{n}\sum_{j=i}^{n}fac(i,j)$. InputThe first line contains one integer n (1 \le n \le 10^6) — the length of the se…
题目:将一个正整数分解质因数.例如:输入90,打印出90=2*3*3*5. 将一个正整数分解质因数分析:对n进行分解质因数,找到最小的质数k如果这个质数恰好等于n则说明分解质因数过程已经结束,打印输出即可如果n<>k,但n能被k整除,则因打印k的值,并用n除以k的商,作为新的正整数n,重复2如果不能被k整除,则用k+1作为k的值 import java.util.*; public class Rabbit{ public static void main(String[] args){ Sy…
Prime Test Time Limit: 6000MS Memory Limit: 65536K Total Submissions: 35528 Accepted: 9479 Case Time Limit: 4000MS Description Given a big integer number, you are required to find out whether it's a prime number. Input The first line contains the…
