N = int(input())
C = list(map(int, input().split()))
MOD = 10 ** 9 + 7

fact = [1] * (N + 1)
rfact = [1] * (N + 1)
r = 1
for i in range(1, N + 1):
    fact[i] = r = r * i % MOD
rfact[N] = r = pow(fact[N], MOD - 2, MOD)
for i in range(N, 0, -1):
    rfact[i - 1] = r = r * i % MOD

x = fact[N - 1]
sumc = 0
D = [0] * N
for i in range(9):
    if C[i] > 0:
        x *= pow(C[i], -1, MOD)
        x %= MOD
t1 = 0
for i in range(9):
    t1 += x * C[i] * (i + 1)
    t1 %= MOD
# int("1" * N)
tmp = 0
for i in range(N):
    tmp *= 10
    tmp += t1
    tmp %= MOD
print(tmp)