N = int(input())
XY = [list(map(int, input().split())) for _ in range(N)]
INF = 10**9
ans = INF
for i in range(1, 301):
    for j in range(1, 301):
        S = 0
        for sx, sy in XY:
            S += abs(i-sx) +abs(j-sy)
        ans = min(ans, S)
print(ans)