#include<bits/stdc++.h>
using namespace std;
int main() {
    int n; cin >> n;
    vector<int> a(n), b(n);
    for(int &c : a) {
        cin >> c;
    }
    for(int &c : b) {
        cin >> c;
    }
    
    int count = 0;
    
    for(int i = 0; i < n; i++) {
        if(a.at(i) != b.at(i)) {
            count++;
            while(i < n && (a.at(i) != b.at(i))) {
                i++;
            }
            i--;
        }
    }
    cout << count << endl;
}