题解 | 阶乘

def fac(n):
    s = 1
    if n == 0:
        return 1
    for i in range(1, n+1):
        s *= i
    return s
def fac_sum(n):
    s1 = 0
    s2 = 0
    for i in range(1,n+1):
        if i % 2 == 0:
            s2 += fac(i)
        else:
            s1 += fac(i)
    return s1, s2

n = int(input())
y1, y2 = fac_sum(n)
print(y1, y2)