import itertools
import bisect

N = int(input())
AB = [tuple(map(int, input().split())) for _ in range(N)]

# 全列挙
def enum(X):
    res = []
    for t in itertools.product((0, 1), repeat=len(X)):
        diff = 0
        for i, x in enumerate(t):
            if x:
                diff += X[i][0]
            else:
                diff -= X[i][1]
        res.append(diff)
    res.sort()
    return res


if N <= 2:
    print(abs(min(enum(AB), key=abs)))
    exit()

# 半分全列挙
first = enum(AB[:N // 2])
second = enum(AB[N // 2:])
ans = float('inf')
for x in first:
    idx = bisect.bisect(second, -x)
    tmp = float('inf')
    if idx < len(second):
        tmp = min(tmp, abs(x + second[idx]))
    if 0 <= idx - 1:
        tmp = min(tmp, abs(x + second[idx - 1]))

    ans = min(ans, tmp)
print(ans)