class NCK:
    '''
    最大値 :N
    mod
    '''
    def __init__(self,N,mod):
        self.mod = mod
        self.N = N
        self.factmod = [1,1]
        for i in range(2,self.N+1):
            self.factmod.append((self.factmod[-1]*i)%self.mod)

        self.inv = [0,1]
        for i in range(2, N + 1):
            self.inv.append((-self.inv[self.mod % i] * (self.mod // i)) % self.mod)

        self.invfact = [1,1]
        for i in range(2, N + 1):
            self.invfact.append((self.invfact[-1]*self.inv[i])%self.mod)

    def nCk(self,a,b):
        if a < b:
            return 0
        return ((self.factmod[a]*self.invfact[b]%self.mod)*self.invfact[a-b])%self.mod
    
    def invnCk(self,a,b):
        return ((self.factmod[a-b]*self.invfact[a]%self.mod)*self.factmod[b])%self.mod

N = int(input())
lsc = list(map(int,input().split()))
sums = sum([(i+1)*lsc[i] for i in range(9)])
mod = 10**9+7
ans = 0
ii = 1
nck = NCK(3*10**5,mod)
nn = nck.factmod[N-1]
for i in range(9):
    nn *= nck.invfact[lsc[i]]
    nn %= mod

for i in range(N):
    ans += ii*sums*nn
    ii *= 10
    ans %= mod
    ii %= mod
print(ans)