import numpy as np


def main():
    N = int(input())
    A = np.array(list(map(lambda letter: bool(int(letter)), input().split())))
    B = np.array(list(map(lambda letter: bool(int(letter)), input().split())))

    left_idx = 0
    right_idx = N - 1

    ctr = 0
    while not np.array_equal(A, B):
        if left_idx == right_idx:
            if A[left_idx] != B[left_idx]:
                ctr += 1
            break

        if A[left_idx] == B[left_idx]:
            left_idx += 1
            continue

        if A[right_idx] == B[right_idx]:
            right_idx -= 1
            continue

        A[left_idx:right_idx+1] = np.logical_not(A[left_idx:right_idx+1])

        ctr += 1

    print(ctr)


if __name__ == "__main__":
    main()