#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int N; cin >> N;
    vector<int> A(N), B(N);
    rep(i,N) cin >> A[i];
    rep(i,N) cin >> B[i];
    vector<int> C(N);
    rep(i,N) C[i] = (A[i] == B[i]);
    vector<pair<int,int>> v;
    v.push_back({C[0], 1});
    for(int i = 1; i < N; i++) {
        if(v.back().first == C[i]) {
            v.back().second++;
        } else {
            v.push_back({C[i], 1});
        }
    }

    int ans = 0;
    for(auto [x, c] : v) if(x == 0) ans++;
    cout << ans << endl;
}