mod = 10 ** 9 + 7

n = int(input())
c = list(map(int, input().split()))
d = 0
for i in range(1, 10):
    d += c[i - 1] * i

fact = [1 for i in range(n + 1)]
inv = [1 for i in range(n + 1)]
fact_inv = [1 for i in range(n + 1)]
for i in range(2, n + 1):
    fact[i] = (fact[i - 1] * i) % mod
    inv[i]  = ((- inv[mod % (i)]) * (mod // i)) % mod
    fact_inv[i] = (fact_inv[i - 1] * inv[i]) % mod


for i in range(9):
    d *= fact_inv[c[i]]

ans = 0
for i in range(n):
    ans *= 10
    ans += (d * fact[n - 1])
    ans %= mod
print(ans)