连题目都不肯贴,还要每个人去网上重复搜索?
原始链接
http://acm.hdu.
Problem Description
A number sequence is defined as follows:
f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7.
Given A, B, and n, you are to calculate the value of f(n).
Input
The input consists of multiple test cases.
Each test case contains 3 integers A, B and n on a single line (1 <= A, B <= 1000,
1 <= n <= 100,000,000).
Three zeros signal the end of input and this test case is not to be processed.
Output
For each test case, print the value of f(n) on a single line.
Sample Input
1 1 3
1 2 10
0 0 0
Sample Output
2
5
错误很明显了
另外正如3楼所言,最大循环周期是7*7