from math import factorial
from collections import deque

N = int(input())

if N > 25:
    print(0)
    exit()

rates = list(map(int, input().split()))
rate_sums = list(range(factorial(N) // factorial(N // 2) // factorial(N - N // 2)))
index = 0

stack = deque()
stack.append((0, 0, 0, -1))
while stack:
    bit, rate_sum, popcnt, k = stack.pop()
    if popcnt == N // 2:
        rate_sums[index] = rate_sum
        index += 1
    else:
        for i in range(k + 1, N - N // 2 + popcnt + 1):
            stack.append((bit | (1 << i), rate_sum + rates[i], popcnt + 1, i))

rate_sums.sort()
ans = 1 << 30
for i in range(len(rate_sums) - 1):
    tmp = abs(rate_sums[i] - rate_sums[i + 1])
    if ans > tmp:
        ans = tmp
print(ans)