import sys
input = sys.stdin.readline

N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
p = [A[i] + B[i] for i in range(N)]
m = [A[i] - B[i] for i in range(N)]
ans = 0
l = 0
for r in range(1, N):
    if p[r-1] >= p[r]:
        l = r
    if m[r-1] >= m[r]:
        l = r
    ans += r - l
print(ans)