from math import factorial

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
for comb in range(1, 1 << N):
    if comb.bit_count() != N // 2:
        continue
    
    rate_sum = 0
    for i in range(N):
        if (comb >> i) & 1: rate_sum += rates[i]
    rate_sums[index] = rate_sum
    index += 1
rate_sums.sort()

ans = 2 ** 30
for i in range(len(rate_sums) - 1):
    if ans > abs(rate_sums[i] - rate_sums[i + 1]):
        ans = abs(rate_sums[i] - rate_sums[i + 1])
print(ans)