M=998244353
m=int(input())
n=list(map(int,input()))[::-1]
p=1
for d in n:
  c=(m-1-d)//10+1
  p*=c
  p%=M
a=0
for i in range(len(n)):
  d=n[i]
  c=(m-1-d)//10+1
  a+=(((c-1)*c//2)*10+d*c)*p*pow(c,M-2,M)*pow(m,i,M)
  a%=M
print(a)