inf=10**16
n = int(input())
xy = []


for _ in range(n):
    xi, yi = list(map(int, input().split()))

    xy.append([xi, yi])

def dist(i,j):
    a,b=xy[i]
    p,q=xy[j]
    return abs(b-a)+p


dp=[[-inf]*n for _ in range(1<<n)]
dp[0][0]=0
 
def chmin(bit,i,val):
    if val>dp[bit][i]:dp[bit][i]=val

for bit in range(1<<n):
    for i in range(n):
        pre=dp[bit][i]
        if pre==-inf:continue
        for j in range(n):
            if bit>>j&1:continue
            chmin(bit|1<<j,j,dist(i,j))

print(dp[-1][0])