N=int(input())
A=list(map(int,input().split()))
B=[]
for i,a in enumerate(A):
    B.append((a,i))
B.sort()
C=[]
for a,i in B:
    C.append(i)
x=0
for c in C:
    x=(10*x+A[c])%998244353
print(x)