import sys
readline=sys.stdin.readline
import bisect

N=int(readline())
A,B=[],[]
for i in range(N):
    a,b=map(int,readline().split())
    A.append(a)
    B.append(b)
inf=1<<60
n=N//2
AB=[-inf,inf]
for bit in range(1<<n):
    a,b=0,0
    for i in range(n):
        if bit&1<<i:
            a+=A[i]
        else:
            b+=B[i]
    AB.append(a-b)
AB.sort()
ans=inf
for bit in range(1<<N-n):
    a,b=0,0
    for i in range(N-n):
        if bit&1<<i:
            a+=A[n+i]
        else:
            b+=B[n+i]
    ab=a-b
    ans=min(ans,AB[bisect.bisect_left(AB,-ab)]-(-ab))
    ans=min(ans,(-ab)-AB[bisect.bisect_right(AB,-ab)-1])
print(ans)