from collections import defaultdict

n = int(input())
a = [int(i) for i in input().split()]
b = [int(i) for i in input().split()]

xa, xb = [], []
for i in range(n-1):
    xa.append(a[i] ^ a[i+1])
    xb.append(b[i] ^ b[i+1])

d = defaultdict(list)
for i, x in enumerate(xb): d[x].append(i)

max_n = 1
while max_n < n - 1: max_n <<= 1
bit = [0] * (max_n + 1)

def add(i):
    while i <= max_n:
        bit[i] += 1
        i += (~i + 1) & i

def query(i):
    res = 0
    while i > 0:
        res += bit[i]
        i -= (~i + 1) & i
    return res

ans = 0
while xa:
    x = xa.pop()
    if not d[x]:
        ans = -1
        break
    
    i = d[x].pop() + 1
    ans += query(i)
    add(i)
print(ans)