#P3529. Matrix Analysis
Matrix Analysis
Description
Given two integral m × n matrices A = {aij} and B = {bij}, we define a sequence of matrices SB = {Bk} with B1 = B where, for each k > 1,
.
Write a program that is capable of evaluating SB efficiently.
Input
The input consists of a single test case and is given in the following format:
m | n | t | |
a11 | a12 | ⋯ | a1n |
a21 | a22 | ⋯ | a2n |
⋮ | ⋮ | ⋱ | ⋮ |
am1 | am2 | ⋯ | amn |
b11 | b12 | ⋯ | b1n |
b21 | b22 | ⋯ | b2n |
⋮ | ⋮ | ⋱ | ⋮ |
bm1 | bm2 | ⋯ | bmn |
i1 | j1 | k1 | |
i2 | j2 | k2 | |
⋮ | ⋮ | ⋮ | |
it | jt | kt |
Bounds on the values are: 1 ≤ m, n ≤ 20; 1 ≤ t ≤ 1000; 0 ≤ aij, bij ≤ 10; 1 ≤ it ≤ m; 1 ≤ jt ≤ n; 1 ≤ kt ≤ 109.
Output
For each t, output bitjtkt mod 1,000,000,007.
2 2 5
1 2
2 1
1 1
1 1
1 1 2
1 2 2
2 1 2
2 2 2
1 1 3
1
2
2
9
1
Hint
1,000,000,007 is a prime.
Source
POJ Founder Monthly Contest – 2008.03.16, Gao Yihan