import bisect
N = int(input())
lsAB = [tuple(map(int,input().split())) for i in range(N)]
# 半分列挙
l = lsAB[:N//2]
r = lsAB[N//2:]

lsl = []
Nl = N//2
for i in range(2**(Nl)):
    v1 = 0
    v2 = 0
    for j in range(Nl):
        if (i>>j)&1:
            v1 += l[j][0]
        else:
            v2 += l[j][1]
    lsl.append(v1-v2)

lsr = []
Nr = N-N//2
for i in range(2**(Nr)):
    v1 = 0
    v2 = 0
    for j in range(Nr):
        if (i>>j)&1:
            v1 += r[j][0]
        else:
            v2 += r[j][1]
    lsr.append(v1-v2)

lsl.sort()
lsr.sort()

lsr = [-float('INF')]+lsr+[float('INF')]
ans = float('INF')

for i in range(len(lsl)):
    v = -lsl[i]
    ind = bisect.bisect(lsr,v)
    k = min(abs(lsr[ind-1]-v),abs(lsr[ind]-v))
    ans = min(ans,k)

print(ans)