n = int(input())
f = [1,1]
for i in range(n-1):
    fib = f[-1] + f[-2]
    f.append(fib)
print(f[n]) n = int(input()) n int(input()) int input() input f = [1,1] f [1,1] 1 1 for i in range(n-1):
    fib = f[-1] + f[-2]
    f.append(fib) i range(n-1) range n-1 n 1 fib = f[-1] + f[-2] fib f[-1] + f[-2] f[-1] f -1 f[-2] f -2 f.append(fib) f.append f append fib print(f[n]) print f[n] f n f = [1,1] [1,1] f n = int(input()) int(input()) n fib = f[-1] + f[-2] f[-1] + f[-2] fib
n = int(input())
f = [1,1]
for i in range(n-1):
    fib = f[-1] + f[-2]
    f.append(fib)
print(f[n])
