Multiply it with initial values i . e with F ( 0 ) = 0 , F ( 1 ) = 1 , F ( 2 ) = 1
if ( n == 1 ) return F [ 0 ] [ 0 ] + F [ 0 ] [ 1 ] ; power ( F , n / 2 ) ; multiply ( F , F ) ; if ( n % 2 != 0 ) multiply ( F , M ) ;