import sys

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

MOD = 1_000_000_007

def main(A):
    # 総積がでかいなら、端の 1 以外はまとめてしまう
    p = 1
    INF = 1 << 20
    for x in A:
        p = min(p * x, INF)
    if p == INF:
        p = 1
        for x in A:
            p = p * x % MOD
        return p
    # 以下、総積が小さい場合。
    # 途中経過は、"a + b*" or "a+" と書ける。
    # b ごとに optimal な a を持つ
    dp = {}
    max_v = 0
    for x in A:
        newdp = {}
        vv = 0
        for b, a in dp.items():
            # a + b * [x] +
            vv = max(vv, a + b * x)
            # a + b * [x] *
            newdp[b * x] = max(newdp.get(b * x, 0), a)
        newdp[x] = max(newdp.get(x, 0), max_v)
        dp = newdp
        max_v = max(vv, max_v + x)
    return max_v

A = tuple(map(int, read().split()))[1:]

print(main(A))