def factorielle(n):
    if n == 0:
        p=1
    else:
        p=1
        for i in range(1,n+1):
            p=p*i
    return (p)

n = 1558
fact = factorielle(n)
print(fact)

'''def factorielle_recresive(n):
    if n == 0:
        p=1
    else:
        p=1
        while n>0 :
            p=n*factrorielle(n-1)
    return (p)
'''

n = 0
fac = factorielle(n)
print(fac)

def coefbinomial(n):
    if k<=n:
        return(factorielle(n)/(factorielle(k)*factorielle(n-k)))
    else:
        return()

print(coefbinomial(2,6))
print(int(coefbinomial(2,6)))