from fractions import Fraction
N = int(input())
A = list(map(int, input().split()))
B = [(Fraction(i, 10 ** len(str(i)) - 1), i) for i in A]
B.sort()
ans = 0
mod = 998244353
for _, i in B:
	ans = (pow(10, len(str(i)), mod) * ans + i) % mod
print(ans)