3.11: 99th Fibonacci Number

What is the 99th Fibonacci number?

Recall that the Fibonacci Numbers are defined by the following recurrence relation:

F(1) = 1
F(2) = 1
F(n+2) = F(n+1) + F(n)     for all n > 0

f1 = f2 = 1
for i in range(99-2):
   f1,f2 = f2,f1+f2
print(f2)


The correct answer should be 218922995834555169026.