30155번 - Crazy Malvika discovers Crazy Fibonacci function 다국어

Malvika was getting bored of the usual Fibonacci problems, and decided to add a little twist to it. She defined a new function f() with the following properties:

• She'll give you two integers, A and B. f(1) is defined to be A and f(2) is B.
• And for all integers x ≥ 2, f(x) = f(x-1) + f(x+1).

She'll give an integer N, and you have to find out what f(N) is. Output the answers modulo 10⁹+7.

The first line of input contains a single integer T denoting number of test cases.

The only line of each test case contains three integers: A, B and N, denoting f(1), f(2) and the query.

For each test case, output a line which contains a single integer, corresponding to f(N) for the given input.

• 1 ≤ T ≤ 10⁵
• -10⁹ ≤ A , B ≤ 10⁹
• 1 ≤ N ≤ 10⁹

In the first test case, f(3) = 7, and so that is the output.

In the second test case, f(3) = -6 and the answer modulo 10⁹+7 is 1000000001.