N = int(input())
A = []
B = []
for _ in range(N):
    pair = list(map(int, input().split()))
    A.append(pair[0])
    B.append(pair[1])

mindiff = float('inf')
for i in range(1<<N):
    a1 = 0
    a2 = 0
    b1 = 0
    b2 = 0
    for j in range(N):
        if i & (1 << j):
            a1 = a1 + A[j]
            b2 = b2 + B[j]
        else:
            a2 = a2 + A[j]
            b1 = b1 + B[j]
    diff1 = abs(a1 - b1)
    diff2 = abs(a2 - b2)
    mindiff = min(mindiff, min(diff1, diff2))

print(mindiff)