Vito'sfamily
T=input()
for t in range(int(T)):
	a=list(map(int,input().split()))
	a=sorted(a[1:])
	m=a[len(a)//2]
	sum=0
	for i in a:
		sum+=abs(i-m)
	print(sum)
Hashmat the brave warrior
while 1:
	try:
		a,b=map(int,input().split())
		print(abs(a-b))
	except:
		break