N = int(input())
A = sorted(list(map(int, input().split())))
ans = 0
C = N + 5
S = sum(A) + 5
pre = [[0] * S for _ in range(C)]
pre[0][0] = 1
for a in A:
    dp = [[0] * S for _ in range(C)]
    for c in range(C):
        for s in range(S):
            dp[c][s] += pre[c][s]
            if c and s - a >= 0:
                dp[c][s] += pre[c - 1][s - a]
                if c >= 2 and s % (c - 1) == 0 and s // (c - 1) >= a:
                    ans += pre[c - 1][s - a]
    pre, dp = dp, pre
    
print(ans)