n=int(input())
L=[list(map(int,input().split())) for _ in range(n)]
ans=10**9
for i in range(1,301):
  for j in range(1,301):
    tmp=0
    for x,y in L:
      tmp+=abs(x-i)+abs(y-j)
    ans=min(ans,tmp)
print(ans)