2017-10-30 01:45

# Brute-force Algorithm

Problem Description
Professor Brute is not good at algorithm design. Once he was asked to solve a path finding problem. He worked on it for several days and finally came up with the following algorithm:

Any fool but Brute knows that the function “funny” will be called too many times. Brute wants to investigate the number of times the function will be called, but he is too lazy to do it.

Now your task is to calculate how many times the function “funny” will be called, for the given a, b and n. Because the answer may be too large, you should output the answer module by P.

Input
There are multiple test cases. The first line of the input contains an integer T, meaning the number of the test cases.

For each test cases, there are four integers a, b, P and n in a single line.
You can assume that 1≤n≤1000000000, 1≤P≤1000000, 0≤a, b<1000000.

Output
For each test case, output the answer with case number in a single line.

Sample Input
3
3 4 10 3
4 5 13 5
3 2 19 100

Sample Output
Case #1: 2
Case #2: 11
Case #3: 12

• 点赞
• 写回答
• 关注问题
• 收藏
• 复制链接分享
• 邀请回答