N = int(input())
A = list(map(int, input().split())) + [0]
B = list(map(int, input().split())) + [0]
ans = 0
for i in range(N + 1):
    if i == 0:
        nowa = A[i] + B[i]
        nowb = A[i] - B[i]
        cnt = 1
    else:
        nexta = A[i] + B[i]
        nextb = A[i] - B[i]
        if nowa < nexta and nowb < nextb:
            cnt += 1
        else:
            ans += (cnt - 1) * cnt // 2
            cnt = 1
        nowa = nexta
        nowb = nextb
print(ans)