N = int(input())
*A, = map(int,(input().split()))
*B, = map(int,(input().split()))
if A[0] == B[0]:
    count=0
else:
    count=1
    
for i in range(N-1):
    if A[i]==B[i]:
        if A[i]==B[i] and A[i+1] != B[i+1]:
            count +=1
    else:
        if A[i] != B[i] and A[i+1] == B[i+1]:
            count +=0
print(count)