def fib(n):
    if n==1 or n==2:
        return 1
    else:
        return fib(n-2) + fib(n-1)

n=eval(input("请输入数字"))
print(fib(n))

1faa18d94ff16da7814be92ac3863928f941d7f8
<mask token>

def fib(n):
    if n == 1 or n == 2:
        return 1
    else:
        return fib(n - 2) + fib(n - 1)


<mask token>

def fib(n):
    if n == 1 or n == 2:
        return 1
    else:
        return fib(n - 2) + fib(n - 1)


<mask token>
print(fib(n))

def fib(n):
    if n == 1 or n == 2:
        return 1
    else:
        return fib(n - 2) + fib(n - 1)


n = eval(input('请输入数字'))
print(fib(n))

def fib(n):
    if n==1 or n==2:
        return 1
    else:
        return fib(n-2) + fib(n-1)

n=eval(input("请输入数字"))
print(fib(n))
