from itertools import accumulate
from collections import defaultdict
N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
A.sort()
B.sort()

# 左揃え
left = []
for i in range(N - 1):
    left.append(abs(A[i] - B[i]))
left = list(accumulate(left))

# 右揃え
right = []
for i in range(1, N):
    right.append(abs(A[-i] - B[-i]))
right = list(accumulate(right))
right.reverse()

#print(left)
#print(right)
memo = defaultdict(list)

for i in range(N):
    score = 0
    if i != 0:
        score += left[i - 1]
    if i != N - 1:
        score += right[i]

    # A[i] を手元に残す
    memo[score].append(A[i])

ans1 = min(memo.keys())
ans2 = list(sorted(set(memo[ans1])))
print(ans1)
print(*ans2)