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

A_sum=sum(A)
DP=[[0]*(A_sum+1) for _ in range(N+1)]
DP[0][0]=1

A.sort()
Ans=0
for p,a in enumerate(A,1):
    for n in range(N,0,-1):
        D=DP[n]
        E=DP[n-1]
        for s in range(A_sum,a-1,-1):
            D[s]+=E[s-a]

            if n>=2 and s>=(n-1)*a and s%(n-1)==0:
                Ans+=E[s-a]

print(Ans)