Chinaunix首页 | 论坛 | 博客
  • 博客访问: 434556
  • 博文数量: 103
  • 博客积分: 5010
  • 博客等级: 大校
  • 技术积分: 971
  • 用 户 组: 普通用户
  • 注册时间: 2007-06-11 17:22
文章分类
文章存档

2008年(77)

2007年(26)

我的朋友

分类: C/C++

2008-06-13 09:25:27

Hamming Problem
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 2644
Accepted: 1137

Description

For each three prime numbers p1, p2 and p3, let's define Hamming sequence Hi(p1, p2, p3), i=1, ... as containing in increasing order all the natural numbers whose only prime divisors are p1, p2 or p3.

For example, H(2, 3, 5) = 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, ...

So H5(2, 3, 5)=6.

Input

In the single line of input file there are space-separated integers p1 p2 p3 i.

Output

The output file must contain the single integer - Hi(p1, p2, p3). All numbers in input and output are less than 10^18.

Sample Input

7 13 19 100

Sample Output

26590291
阅读(1416) | 评论(0) | 转发(0) |
给主人留下些什么吧!~~