from itertools import permutations
MOD = 998244353
N = int(input())
A = list(map(int, input().split()))
B = [(str(A[i]), i) for i in range(N)]
B.sort()

x = 0
for i in range(N):
    idx = B[i][1]
    x = pow(10, len(str(A[idx]))) * x + A[idx]
    x %= MOD

print(x)