Easy Linear Recurrences
Practice
3.8 (53 votes)
Matrix exponentiation
Medium
Problem
41% Success 685 Attempts 30 Points 2s Time Limit 256MB Memory 1024 KB Max Code
You are given the following recurrences,
-
F(n) = a * F(n - 1) + b * G(n - 2) for n >= 2
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G(n) = c * G(n - 1) + d * F(n - 2) for n >=2
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H(n) = e * F(n) + f * G(n) for n >= 0
Input
First line contains the following 10 numbers in order : a, b, c, d, e, f, F[0], F[1], G[0], G[1].
Next line contains a single integer Q, the number of queries. The following Q lines contain a single query integer each: n
Output
For each query parameter n, output the sum *H[0] + H[1] +......+ H[n] modulo 1,000,000,007 * in a separate line.
Constraints
1 <= Q <= 1,000,000
All other input parameters lie in the range [0, 1,000,000,000]
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