n = int(input())
ls = [list(map(int, input().split())) for _ in range(n)]
ans = 1 << 30
for x in range(1, 301):
  for y in range(1, 301):
    res = 0
    for xi, yi in ls:
      res += abs(x - xi) + abs(y - yi)
    ans = min(ans, res)
print(ans)