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)