"""
Fibonacci 2
www.3d-meier.de
18.05.2019
"""

def Fibonacci(n):
    a = 1
    b = 1
    if n == 1:
        return a
    elif n == 2:
        return b
    else:
        for i in range(1,n-1):
            c = a + b
            a = b
            b = c
        return b

def main():
    print(Fibonacci(10))

if __name__=='__main__':
    main()