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( Optional for 2 % extra credit: An algorithm with logarithmic efficiency ) Now we want to get better efficiency for the Fibonacci numbers. A

(Optional for 2% extra credit: An algorithm with logarithmic efficiency)
Now we want to get better efficiency for the Fibonacci numbers. A new property
is needed to achieve this goal. From our textbook, we have the following matrix
formula,
[F(n-1)F(n)F(n)F(n+1)]=[0111]n, for ,n1.
In order to apply this formula, you need to know how to calculate the matrix
multiplication. To calculate the powers of a matrix as fast as possible, we can
use the repeated squaring technique. We still use the Java BigInteger class to do
calculation for this part. If you use Python, it can handle big integers automatically
without any special treatment.
You still pass the problem size n as before. If n is not provided, use the default
value n=1000.
For each of your program/method, write appropriate messages for the users to under-
stand what you are doing.
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