The Euler function[HDU2824]

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The Euler function[HDU2824]

The Euler functionTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6018 Accepted Submission(s): 2539 Problem DescriptionThe Euler function phi is an important kind of function in number theory, (n)…

hdu2824 The Euler function（欧拉函数个数）

版权声明:本文为博主原创文章,未经博主同意不得转载. vasttian https://blog.csdn.net/u012860063/article/details/36426357 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2824 欧拉函数性质: 1:(百科):http://baike.baidu.com/link?url=r-yneKCCyS9N6bhbQCqiZX0V2OCYq9r7iHSzHTSs03H7qRvu1OfUzlOxf…

HDU2824 The Euler function

Time Limit: 1000MS Memory Limit: 32768KB 64bit IO Format: %I64d & %I64u Description The Euler function phi is an important kind of function in number theory, (n) represents the amount of the numbers which are smaller than n and coprime to n, and…

The Euler function（欧拉函数）

The Euler function Time Limit : 2000/1000ms (Java/Other) Memory Limit : 32768/32768K (Java/Other) Total Submission(s) : 39 Accepted Submission(s) : 19 Font: Times New Roman | Verdana | Georgia Font Size: ← → Problem Description The Euler function…

hdu 2824 The Euler function

The Euler function Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5028 Accepted Submission(s): 2123 Problem Description The Euler function phi is an important kind of function in number theo…

hdu 2824 The Euler function(欧拉函数)

题目链接:hdu 2824 The Euler function 题意: 让你求一段区间的欧拉函数值. 题解: 直接上板子. 推导过程: 定义:对于正整数n,φ(n)是小于或等于n的正整数中,与n互质的数的数目. 例如:φ(8)=4,因为1,3,5,7均和8互质. 性质:1.若p是质数,φ(p)= p-1. 2.若n是质数p的k次幂,φ(n)=(p-1)*p^(k-1).因为除了p的倍数都与n互质 3.欧拉函数是积性函数,若m,n互质,φ(mn)= φ(m)φ(n). 根据这3条性质我们就可以推…