import numpy as np
INF = 1<<50
N = int(input())
satisf = [tuple(map(int,input().split())) for _ in range(N)]
if N == 1:
    print(min(satisf[0]))
    exit()
left = np.array([satisf[0][0],-satisf[0][1]])
for x,y in satisf[1:N//2]:
    left = np.concatenate([left + x,left - y])
right = np.array([satisf[N//2][0],-satisf[N//2][1]])
for x,y in satisf[N//2 + 1:]:
    right = np.concatenate([right + x,right - y])

right = np.array([-INF] + np.sort(np.unique(right)) + [INF])
idx = np.searchsorted(right,-left,'left')
ans1 = np.abs(left + right[idx]).min()
ans2 = np.abs(left + right[idx - 1]).min()
print(min(ans1,ans2))