import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
sys.setrecursionlimit(10**7)
yes = lambda :print("yes");Yes = lambda :print("Yes")
no = lambda :print("no");No = lambda :print("No")
#######################################################################

n = ni()
c = na()
mod = 10**9+7
z = 1
f = 1
for i in range(1,n):
    f*=i
for i in range(9):
    for j in range(1,c[i]+1):
        f*=pow(j,mod-2,mod)
ans = 0
for i in range(n):
    for j in range(9):
        ans+=f*z%mod*c[j]%mod*(j+1)%mod
        ans%=mod
    z*=10
    z%=mod
print(ans)