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())))

    AB_diff = (A == B).tolist()

    left_idx = 0

    ctr = 0

    while left_idx < N:
        try:
            left_idx = AB_diff.index(False, left_idx)
        except ValueError:
            break
        ctr += 1
        try:
            left_idx = AB_diff.index(True, left_idx)
        except ValueError:
            break
    print(ctr)


if __name__ == "__main__":
    main()