n = int(input())
def factorial(x):
    r = 1
    for i in range(1,x+1):
        r *= i
    return r
lst = []
for i in range(1,n+1):
    lst.append(factorial(i))
print(sum(lst))

def jc(a):
    c=1
    for i in range(1,a+1):
        c=c*i
    return c
a=int(input())
ans=0
for n in range(1,a+1):
    ans=ans+jc(n)
print(ans)

python yyds