#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <random>
#include <stdio.h>
#include <fstream>
#include <functional>
#include <cassert>
#include <atcoder/all>


using namespace std;
using namespace atcoder;


#define rep(i,n) for (int i=0;i<n;i+=1)
#define append push_back
#define all(x) (x).begin(), (x).end()

template<class T>
using vec = vector<T>;
template<class T>
using vvec = vec<vec<T>>;
template<class T>
using vvvec = vec<vvec<T>>;
using ll = long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;


template<class T>
bool chmin(T &a, T b){
  if (a>b){
    a = b;
    return true;
  }
  return false;
}

template<class T>
bool chmax(T &a, T b){
  if (a<b){
    a = b;
    return true;
  }
  return false;
}

template<class T>
T sum(vec<T> x){
  T res=0;
  for (auto e:x){
    res += e;
  }
  return res;
}

template<class T>
void printv(vec<T> x){
  for (auto e:x){
    cout<<e<<" ";
  }
  cout<<"\n";
}

template<class T>
ostream& operator<<(ostream& os, const vec<T>& A){
  os << "[";
  rep(i,A.size()){
    os << A[i];
    if (i!=A.size()-1){
      os << ", ";
    }
  }
  os << "]" ;
  return os;
}

template<class T>
ostream& operator<<(ostream& os, const deque<T>& A){
  os << "deque{[";
  rep(i,A.size()){
    os << A[i];
    if (i!=A.size()-1){
      os << ", ";
    }
  }
  os << "]}" ;
  return os;
}

template<class T>
ostream& operator<<(ostream& os, const pair<T,T>& A){
  os << "(";
  os << A.first ;
  os << ", ";
  os << A.second;
  os << ")";
  return os;
}

struct S{
  int val,cnt;
};

S op(S a,S b){
  if (a.val < b.val){
    return a;
  }
  if (b.val < a.val){
    return b;
  }
  return {a.val,a.cnt+b.cnt};
}

S e(){
  return {(int)1e9,0};
}

using F = int;

S mapping(F f,S x){
  return {x.val+f,x.cnt};
}

F composition(F f,F g){
  return f+g;
}

F id(){
  return 0;
}



int main() {

  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);

  int N;
  cin>>N;
  vec<int> A(N),B(N);
  rep(i,N){cin>>A[i];}
  rep(i,N){cin>>B[i];}

  int M = 4e5;

  vec<int> first_A(M+1,N);
  vec<int> first_B(M+1,N);

  vec<S> init(N,{0,1});
  lazy_segtree<S,op,e,F,mapping,composition,id> seg(init);

  ll res = 0;
  int l,r;
  for (int i=N-1;0<=i;i--){
    l = min(first_A[A[i]],first_B[A[i]]);
    r = max(first_A[A[i]],first_B[A[i]]);
    seg.apply(l,r,-1);

    first_A[A[i]] = i;
    l = min(first_A[A[i]],first_B[A[i]]);
    r = max(first_A[A[i]],first_B[A[i]]);
    seg.apply(l,r,1);

    l = min(first_A[B[i]],first_B[B[i]]);
    r = max(first_A[B[i]],first_B[B[i]]);
    seg.apply(l,r,-1);

    first_B[B[i]] = i;
    l = min(first_A[B[i]],first_B[B[i]]);
    r = max(first_A[B[i]],first_B[B[i]]);
    seg.apply(l,r,1);

    S tmp = seg.prod(i,N);
    //cout << tmp.val << " " << tmp.cnt << endl;
    if (tmp.val==0){
      res += (ll)tmp.cnt;
    }
  }

  cout << res << endl;




       

}