from math import gcd
import sys
input = sys.stdin.readline

def ones(N):
    return (pow(10, N, mod) - 1) * pow(9, mod-2, mod) % mod

mod = 10**9 + 7
N = int(input())
c = [0] + list(map(int, input().split()))
for d in range(1, 10):
    if c[d] == N:
        print(d * ones(N) % mod)
        exit()
s = 0
ans = 0
for d in range(1, 10):
    s += c[d]
ans = 0
for i in range(1, 9):
    for j in range(i + 1, 10):
        a = 10 * j + i
        b = 10 * i + j
        ans = gcd(ans, b - a)
total = sum(d * c[d] for d in range(1, 10))
if total % 9 != 0 and ans % 9 == 0:
    ans //= 3
if total % 3 != 0 and ans % 3 == 0:
    ans //= 3

print(ans)