编程介的小学生 2017-09-15 14:05 采纳率: 20.5%
浏览 838
已采纳

Ene's problem

Problem Description
Ene was a girl lives in computer systems. When she was studying the periodic sequence bn = Bn mod P (B is an integer and P is a prime number, n >= 0), she chose a contiguous subsequence bs, bs + 1, …, bt, and marked them as special numbers. Then she began to investigate another sequence an = M × An mod P, (M and A are integers) and incidentally such a problem came to her mind: what is the minimum non-negative integer k such that ak is a special number(k starts from 0) ?

As a result of Ene's ability to control a computer, she soon answered the question of herself. But as she had never taken any computer science courses, she could only enumerate all possible solutions to get the answer. Your task is to solve her questions faster, so your algorithm should possess a lot higher performance than hers.

Input
There are no more than 100 test cases in the input. In each case, you are given six integers M, A, B, s, t, P, satisfying 2 ≤ A, B, M < P ≤ 109,0 ≤ s ≤ t < P - 1, and P is a prime number. The input ends by 0 0 0 0 0 0.

Output
For each test case, output your answer k in one line. If there's no solution, output "impossible" (no quotes).

Sample Input
2 3 5 1 6 11
2 3 8 1 6 11
0 0 0 0 0 0

Sample Output
impossible
1

  • 写回答

1条回答 默认 最新

  • devmiao 2017-09-30 01:25
    关注
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 求差集那个函数有问题,有无佬可以解决
  • ¥15 【提问】基于Invest的水源涵养
  • ¥20 微信网友居然可以通过vx号找到我绑的手机号
  • ¥15 寻一个支付宝扫码远程授权登录的软件助手app
  • ¥15 解riccati方程组
  • ¥15 display:none;样式在嵌套结构中的已设置了display样式的元素上不起作用?
  • ¥15 使用rabbitMQ 消息队列作为url源进行多线程爬取时,总有几个url没有处理的问题。
  • ¥15 Ubuntu在安装序列比对软件STAR时出现报错如何解决
  • ¥50 树莓派安卓APK系统签名
  • ¥65 汇编语言除法溢出问题