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

def f(l, s, m):
    return l * 100000000 + s * 10000 + m
# 長さ　合計値　最大値
dp = {0:1}
for a in A:
    dp2 = {}
    for lsm, v in dp.items():
        l = lsm // 100000000
        lsm -= l * 100000000
        s = lsm // 10000
        m = lsm - s * 10000
        dp2[f(l, s, m)] = dp2.get(f(l, s, m), 0) + v
        dp2[f(l + 1, s + a, max(m, a))] = dp2.get(f(l + 1, s + a, max(m, a)), 0) + v
    dp = dp2
    
ans = 0

for lsm, v in dp.items():
    l = lsm // 100000000
    lsm -= l * 100000000
    s = lsm // 10000
    m = lsm - s * 10000
    if l >= 2:
        if s % (l - 1) == 0 and m <= s // (l - 1):
            ans += v
print(ans)