N=int(input())
C=list(map(int,input().split()))
mod=10**9+7
if max(C)==N:
  ANS=0
  for i in range(9):
    if C[i]:
      ANS=(pow(10,N,mod)-1)*pow(9,mod-2,mod)*(i+1)%mod
  print(ANS)
  exit()
x=sum([C[i]*(i+1) for i in range(9)])
ANS=1
if sum([C[i-1] for i in range(1,10,2)])==0:
  ANS*=2
if x%3==0:
  ANS*=3
if x%9==0:
  ANS*=3
print(ANS)