from functools import cmp_to_key

def comp(a, b):
    if a + b < b + a:
        return -1
    elif a + b == b + a:
        return 0
    else:
        return 1

N = int(input())
A = list(map(str, input().split()))
A.sort(key=cmp_to_key(comp))

mod = 998244353

pow_10 = [pow(10, i, mod) for i in range(19)]

now = 0
for i in range(N):
    len_a = len(A[i])
    now = (now * pow_10[len_a]) % mod
    now = (now + int(A[i])) % mod
print(now)