import itertools

N = int(input())
A = list(map(int, input().split()))

A = sorted(A)
if N % 2:
	D = A[0]
	for i in range(N // 2):
		D *= 10
		D += A[1 + i]
		D -= A[(N - 1) - i]
	print(D % 998244353)
else:
	B = [0] * 10
	for i in range(N):
		B[A[i]] += 1
	C = []
	for x in range(10):
		if B[x] % 2:
			C.append(x)
	M = len(C)
	
	assert(M == 2)
	
	if M == 0:
		print(0)
	else:
		ans = 1001001001001
		for p in itertools.permutations(range(M)):
			p_list = list(p)
			p1 = p_list[0: M // 2]
			p2 = p_list[M // 2: M]
			X = 0
			Y = 0
			for i in p1:
				X *= 10
				X += C[i]
			for i in p2:
				Y *= 10
				Y += C[i]
			ans = min(ans, abs(X - Y))
		
		print(ans)