MOD = 998244353


class T:
    def __init__(self, x):
        self.x = x

    def __lt__(self, other):
        return self.x + other.x < other.x + self.x


n = int(input())
A = [T(x) for x in 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:
    a = a.x
    ans = (ans * pow10[len(a)] + int(a)) % MOD
print(ans)