#include<bits/stdc++.h>
using namespace std;

using ll = int_fast64_t;
#define rep(i,n) for(int i=0;i<(n);++i)

signed main(){

  int n;
  cin>>n;
  vector<ll> a(n),b(n);
  rep(i,n)cin>>a[i];
  rep(i,n)cin>>b[i];

  vector<int> t(n);
  rep(i,n)t[i]=(a[i]==b[i]);

  t.erase(unique(begin(t),end(t)),end(t));

  int ans = 0;
  for(auto ti:t)if(ti==0)ans++;
  cout<<(ans)<<endl;

}