def f(n):
	s = str(n)
	while len(s) < 6:
		s += s[0]
	return s

MOD = 998244353

N = int(input())
*A, = map(int, input().split())
A.sort(f)

x = 0
for a in A:
	for _ in range(len(str(a))):
		x *= 10
		x %= MOD
	x += a
	x %= MOD

print(x)