m = 1000000007

N, *c = map(int, open(0).read().split())

fac = [1] * 10
for i in range(9):
    fac[i + 1] = fac[i] * (i + 1)
    fac[i + 1] %= m

x = pow(10, N, m)
result = 0
for i in range(9):
    result += c[i] * (i + 1) * x
    result %= m
for i in range(9):
    result *= pow(fac[c[i]], -1, m)
    result %= m
print(result)