Function that returns nth Fibonacci number
def fib ( n , m ) : NEW_LINE INDENT F = [ [ 1 , 1 ] , [ 1 , 0 ] ] ; NEW_LINE if ( n == 0 ) : NEW_LINE INDENT return 0 ; NEW_LINE DEDENT power ( F , n - 1 , m ) ; NEW_LINE return F [ 0 ] [ 0 ] ; NEW_LINE DEDENT