N=int(input())
C=list(map(int,input().split()))

mod=10**9+7

FACT=[1]
for i in range(1,2*10**5+1):
    FACT.append(FACT[-1]*i%mod)

FACT_INV=[pow(FACT[-1],mod-2,mod)]
for i in range(2*10**5,0,-1):
    FACT_INV.append(FACT_INV[-1]*i%mod)

FACT_INV.reverse()

def Combi(a,b):
    if 0<=b<=a:
        return FACT[a]*FACT_INV[b]%mod*FACT_INV[a-b]%mod
    else:
        return 0



ANS=0
SUM=sum(C)

Y=0
for i in range(SUM):
    Y+=pow(10,i,mod)
    Y%=mod

for i in range(9):
    if C[i]==0:
        continue
    X=1
    S=SUM-1
    for j in range(9):
        if i==j:
            X=X*Combi(S,C[j]-1)
            S-=C[j]-1
        else:
            X=X*Combi(S,C[j])
            S-=C[j]
        X%=mod

    ANS+=X*Y*(i+1)
    ANS%=mod
            
    

print(ANS)