import sys
input = sys.stdin.readline

N=int(input())
A=list(map(int,input().split()))

A.sort(reverse=True)

KO=1
BO=1

for i in range(N):
    a=A[-1]

    c=0
    for j in range(len(A)):
        if a==A[j]:
            c+=1

    KO*=c
    BO*=len(A)
    A.pop()

print(BO//KO)