N=int(input())
A=[]
for i in range(N):
  x,y=map(int, input().split())
  A.append((x,y))
  
ans=10**20
for h in range(1,301):
  for w in range(1,301):
    d=0
    for x,y in A:
      d+=abs(h-x)+abs(w-y)
    ans=min(ans,d)
print(ans)