from math import gcd

mod = 10 ** 9 + 7

n = int(input())
c = list(map(int, input().split()))
g = 0
for i in range(9):
    for j in range(i + 1, 9):
        if c[i] and c[j]:
            g = gcd(g, 9 * (j - i))


def one_mod(n, mod):
    if n == 0:
        return 0
    if n == 1:
        return 1
    if n % 2 == 0:
        return one_mod(n // 2, mod) * (1 + pow(10, n // 2, mod))
    return one_mod(n - 1, mod) + pow(10, n - 1, mod)


res = 0
if g == 0:
    x = 0
    for i in range(9):
        v = pow(10, c[i], mod)
        x *= v
        x %= mod
        x += (i + 1) * one_mod(c[i], mod)
    print(x)
    exit()
for k in range(1, g + 1):
    if g % k:
        continue
    x = 0
    for i in range(9):
        x *= pow(10, c[i], k)
        x += (i + 1) * one_mod(c[i], k)
        x %= k
    if x == 0:
        res = k
print(res % mod)