import sys
input = sys.stdin.readline

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

# x個なら、和が(x-1)の倍数k*(x-1)で、各数字がk以下

A.sort()

SUM=sum(A)

DP=[[0]*(SUM+1) for i in range(N+1)]
DP[0][0]=1

ANS=0
for a in A:
    for i in range(N-1,-1,-1):
        for j in range(SUM-a,-1,-1):
            if DP[i][j]==0:
                continue

            else:
                if i>=1 and (j+a)%i==0:
                    k=(j+a)//i
                    if a<=k:
                        ANS+=DP[i][j]
                        
                DP[i+1][j+a]+=DP[i][j]

print(ANS)