## https://yukicoder.me/problems/no/1612

from functools import cmp_to_key

MOD = 998244353

def cmp_str(a, b):
    a1 = a + b
    a2 = b + a
    if a1 < a2:
        return -1
    elif a1 > a2:
        return 1
    else:
        return 0


def main():
    N = int(input())
    A = input().split()

    A = list(sorted(A, key=cmp_to_key(cmp_str)))

    answer_str = "".join(A)
    answer = 0
    for a in answer_str:
        answer *= 10
        answer %= MOD
        answer += int(a)
        answer %= MOD
    print(answer)



if __name__ == "__main__":
    main()