N = int(input())
point = []
for _ in range(N):
	x,y = map(int,input().split())
	point.append((x,y))
	
ans = 10 ** 10

for i in range(301):
	for j in range(301):
		tmp = 0
		for x,y in point:
			tmp += abs(x - i) + abs(y - j)
		if tmp < ans:ans = tmp
print(ans)