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

signed main(){
  int n; cin >> n;
  int ans = 0, cnt = 0;
  vector<int> a(n), b(n);
  rep(i, n) cin >> a[i];
  rep(i, n) cin >> b[i];
  rep(i, n){
    if(a[i] != b[i]) cnt++;
    else{
      if(cnt){
        cnt = 0; ans++;
      }
    }
  }
  cout << ans+(cnt?1:0) << endl;
}