N = 10**6
mod = 10**9+7
fac = [1]*(N+1)
finv = [1]*(N+1)
for i in range(N):
    fac[i+1] = fac[i] * (i+1) % mod
finv[-1] = pow(fac[-1], mod-2, mod)
for i in reversed(range(N)):
    finv[i] = finv[i+1] * (i+1) % mod

n = int(input())
C = list(map(int, input().split()))
table = [0]*n
table[0] = 1
for i in range(1, n):
    table[i] = table[i-1]*10
    table[i] %= mod
s = sum(table)%mod
c = 0
for i in range(9):
    c += (i+1)*C[i]
c %= mod
ans = fac[n-1]*s*c
ans %= mod
for i in range(9):
    ans *= finv[C[i]]
print(ans%mod)