import sys
from collections import defaultdict

def main():
    N, *rest = map(int, sys.stdin.read().split())
    A = rest[:N]

    # Initialize DP: dp[m] is a dictionary where keys are (sum, max) and values are counts
    dp = [defaultdict(int) for _ in range(N+1)]
    dp[0][(0, 0)] = 1  # Base case: empty subsequence

    for a in A:
        # Iterate m in reverse to avoid using the same a multiple times in the same step
        for m in range(N-1, -1, -1):
            # Make a copy of the current state to iterate over
            current = list(dp[m].items())
            for (s, x), cnt in current:
                new_m = m + 1
                new_s = s + a
                new_x = max(x, a)
                if new_m > N:
                    continue
                dp[new_m][(new_s, new_x)] += cnt

    ans = 0

    for m in range(2, N+1):
        divisor = m - 1
        if divisor == 0:
            continue
        for (s, x), cnt in dp[m].items():
            if s % divisor != 0:
                continue
            k = s // divisor
            if x <= k:
                ans += cnt

    print(ans)

if __name__ == "__main__":
    main()