N=int(input())
A=list(map(str,input().split()))
A=[list(a) for a in A]
A=[a+[a[-1]]*18 for a in A]
A.sort()
ans=[]
for a in A:
    a=a[:-18]
    ans+=a
fa=0
left=1
p=998244353
for i in range(len(ans)-1,-1,-1):
    fa+=left*int(ans[i])
    left*=10
    left%=p
    fa%=p
print(fa%p)