MOD = 998244353

n = int(input())
A = list(input().split())
A.sort()
pow10 = [1] * 20
for i in range(1, 20):
    pow10[i] = (10 * pow10[i - 1]) % MOD

ans = 0
for a in A:
    ans = (ans * pow10[len(a)] + int(a)) % MOD
print(ans)