/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.08.22 17:26:30
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    int n;cin >> n;
    vector<int> a(n),b(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int i = 0; i < n; i++) {
        cin >> b[i];
        b[i] = a[i] ^ b[i];
    }
    int cnt = 0;
    b.push_back(0);
    for (int i = 0; i < n; i++) {
        if (b[i] == 1 & b[i + 1] == 0) cnt++;
    }
    cout << cnt << endl;
    return 0;
}