n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
c1 = [0] * n
c2 = [0] * n
for i in range(n):
    c1[i] = a[i] + b[i]
    c2[i] = a[i] - b[i]
l = [0]
for i in range(n - 1):
    if c1[i] >= c1[i + 1] or c2[i] >= c2[i + 1]:
        l.append(i + 1)
l.append(n)
ans = 0
for i in range(len(l) - 1):
    ans += (l[i + 1] - l[i]) * (l[i + 1] - l[i] - 1) // 2
print(ans)