#include <bits/stdc++.h>
using namespace std;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif
using ll = long long;
using ld = long double;
using ull = unsigned long long;
#define endl "\n"
typedef pair<int,int> Pii;
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define REP3(i, m, n) for (int i = (m); (i) < int(n); ++ (i))
#define FOR(i,a,b) for(ll i=a;i<=(ll)(b);i++)
#define rep(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define ALL(x) begin(x), end(x)
#define PB push_back
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(s) (s).begin(),(s).end()
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)
#define rever(vec) reverse(vec.begin(), vec.end())
#define sor(vec) sort(vec.begin(), vec.end())
#define fi first
#define se second
#define pb push_back
#define P pair<ll,ll>
#define PQminll priority_queue<ll, vector<ll>, greater<ll>>
#define PQmaxll priority_queue<ll,vector<ll>,less<ll>>
#define PQminP priority_queue<P, vector<P>, greater<P>>
#define PQmaxP priority_queue<P,vector<P>,less<P>>
#define NP next_permutation
typedef string::const_iterator State;
class ParseError {};
//const ll mod = 1000000009;
const ll mod = 998244353;
//const ll mod = 1000000007;
const ll inf = 4100000000000000000ll;
const ld eps = ld(0.00000000000001);
//static const long double pi = 3.141592653589793;
template<class T>void vcin(vector<T> &n){for(int i=0;i<int(n.size());i++) cin>>n[i];}
template<class T,class K>void vcin(vector<T> &n,vector<K> &m){for(int i=0;i<int(n.size());i++) cin>>n[i]>>m[i];}
template<class T>void vcout(vector<T> &n){for(int i=0;i<int(n.size());i++){cout<<n[i]<<" ";}cout<<endl;}
template<class T>void vcin(vector<vector<T>> &n){for(int i=0;i<int(n.size());i++){for(int j=0;j<int(n[i].size());j++){cin>>n[i][j];}}}
template<class T>void vcout(vector<vector<T>> &n){for(int i=0;i<int(n.size());i++){for(int j=0;j<int(n[i].size());j++){cout<<n[i][j]<<" ";}cout<<endl;}cout<<endl;}
void yes(bool a){cout<<(a?"yes":"no")<<endl;}
void YES(bool a){cout<<(a?"YES":"NO")<<endl;}
void Yes(bool a){cout<<(a?"Yes":"No")<<endl;}
void possible(bool a){ cout<<(a?"possible":"impossible")<<endl; }
void Possible(bool a){ cout<<(a?"Possible":"Impossible")<<endl; }
void POSSIBLE(bool a){ cout<<(a?"POSSIBLE":"IMPOSSIBLE")<<endl; }
template<class T>void print(T a){cout<<a<<endl;}
template<class T>auto min(const T& a){ return *min_element(all(a)); }
template<class T>auto max(const T& a){ return *max_element(all(a)); }
template<class T,class F>void print(pair<T,F> a){cout<<a.fi<<" "<<a.se<<endl;}
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0;}
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0;}
template<class T> void ifmin(T t,T u){if(t>u){cout<<-1<<endl;}else{cout<<t<<endl;}}
template<class T> void ifmax(T t,T u){if(t>u){cout<<-1<<endl;}else{cout<<t<<endl;}}
ll fastgcd(ll u,ll v){ll shl=0;while(u&&v&&u!=v){bool eu=!(u&1);bool ev=!(v&1);if(eu&&ev){++shl;u>>=1;v>>=1;}else if(eu&&!ev){u>>=1;}else if(!eu&&ev){v>>=1;}else if(u>=v){u=(u-v)>>1;}else{ll tmp=u;u=(v-u)>>1;v=tmp;}}return !u?v<<shl:u<<shl;}
ll modPow(ll a, ll n, ll mod) { if(mod==1) return 0;ll ret = 1; ll p = a % mod; while (n) { if (n & 1) ret = ret * p % mod; p = p * p % mod; n >>= 1; } return ret; }
vector<ll> divisor(ll x){ vector<ll> ans; for(ll i = 1; i * i <= x; i++){ if(x % i == 0) {ans.push_back(i); if(i*i!=x){ ans.push_back(x / ans[i]);}}}sor(ans); return ans; }
ll pop(ll x){return __builtin_popcountll(x);}
ll poplong(ll x){ll y=-1;while(x){x/=2;y++;}return y;}
P hyou(P a){ll x=fastgcd(abs(a.fi),abs(a.se));a.fi/=x;a.se/=x;if(a.se<0){a.fi*=-1;a.se*=-1;}return a;}
P Pplus(P a,P b){ return hyou({a.fi*b.se+b.fi*a.se,a.se*b.se});}
P Ptimes(P a,ll b){ return hyou({a.fi*b,a.se});}
P Ptimes(P a,P b){ return hyou({a.fi*b.fi,a.se*b.se});}
P Pminus(P a,P b){ return hyou({a.fi*b.se-b.fi*a.se,a.se*b.se});}
P Pgyaku(P a){ return hyou({a.se,a.fi});}

void cincout() {
  ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
  cout<< fixed << setprecision(10);
}

int main(){
  cincout();
  ll n;
  cin>>n;
  vector<ll> a(n),b(n);
  vcin(a);
  vcin(b);
  for(auto &e:a) e--;
  for(auto &e:b) e--;
  map<ll,ll> mi;
  for(auto e:a) mi[e]++;
  for(auto e:b) mi[e]++;
  vector<bool> use(400000,false);
  ll V=0;
  for(int i=0;i<400000;i++){
    if(mi[i]>=1000){
      use[i]=true;
      V++;
    }
  }
  std::random_device seed;
  std::default_random_engine engine(seed());
  std::uniform_int_distribution<ll> M(V,499),Mo(900000000,1000000000),X(1,900000000);
  vector<ll> d(400000);
  ll Now=0;
  for(int i=0;i<400000;i++){
    if(use[i]){
      d[i]=Now;
      Now++;
    }
    else d[i]=M(engine);
  }
  for(auto &e:a) e=d[e];
  for(auto &e:b) e=d[e];
  vector<queue<ll>> x(500),y(500);
  vector<ll> q(500);
  for(int i=0;i<500;i++) q[i]=X(engine);
  for(int i=0;i<n;i++){
    x[a[i]].push(i);
    y[b[i]].push(i);
  }
  vector<bool> ok(n),ok2(n);
  for(int i=0;i<500;i++){
    if(x[i].size()){
      ok[x[i].front()]=true;
    }
  }
  for(int i=0;i<500;i++){
    if(y[i].size()){
      ok2[y[i].front()]=true;
    }
  }
  ll m=Mo(engine);
  vector<ll> rui(n);
  //a[i]-b[i] の和
  for(int i=0;i<n;i++){
    if(ok[i]) rui[i]+=q[a[i]];
    if(ok2[i]) rui[i]-=q[b[i]];
    if(i) rui[i]+=rui[i-1];
    rui[i]%=m;
    rui[i]+=m;
    rui[i]%=m;
  }
  ll ans=0;
  for(auto e:rui) if(e==0) ans++;
  ll zero=ans;
  for(int i=1;i<n;i++){
    if(rui[i-1]==0) zero--;
    //a[i-1]-b[i-1] を消す
    ll p=a[i-1];
    x[p].pop();
    if(x[p].size()){
      ll ne=x[p].front();
      // i から ne-1 まで
      for(int j=i;j<=ne-1;j++){
        if(rui[j]==0) zero--;
        rui[j]-=q[a[i-1]];
        rui[j]+=m;
        rui[j]%=m;
        if(rui[j]==0) zero++;
      }
    }
    else{
      for(int j=i;j<=n-1;j++){
        if(rui[j]==0) zero--;
        rui[j]-=q[a[i-1]];
        rui[j]+=m;
        rui[j]%=m;
        if(rui[j]==0) zero++;
      }
    }
    ll qi=b[i-1];
    y[qi].pop();
    if(y[qi].size()){
      ll ne=y[qi].front();
      for(int j=i;j<=ne-1;j++){
        if(rui[j]==0) zero--;
        rui[j]+=q[b[i-1]];
        rui[j]%=m;
        if(rui[j]==0) zero++;
      }
    }
    else{
      for(int j=i;j<=n-1;j++){
        if(rui[j]==0) zero--;
        rui[j]+=q[b[i-1]];
        rui[j]%=m;
        if(rui[j]==0) zero++;
      }
    }
    ans+=zero;
  }
  cout<<ans<<endl;
}