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

int main(){
    ios::sync_with_stdio(false);
    int N; cin>>N;
    vector<int> A(N),B(N);
    rep(i,N) cin>>A[i];
    rep(i,N) cin>>B[i];

    string flg="same"; // same or dif
    int ans = 0;
    rep(i,N){
        if(A[i]!=B[i]){
            flg = "dif";
        }else if(A[i]==B[i] && flg=="dif"){
            ans++;
            flg = "same";
        }

        if(i == N-1 && flg=="dif") ans++;
    }
    cout << ans << endl;
}