# 5# 3 5 2 5 9## 2 3 5 5 9#import sysinput = sys.stdin.readlineT = int(input().rstrip())nums = list(map(int, input().split()))nums.sort()result = sys.maxsizefor i in range(len(nums)): for j in range(i + 3, len(nums)): l = i + 1 r = j - 1 while l abs(temp): result = abs(temp) if temp