#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353; //1000000007;
using ll=long long;
using pp=pair<int,int>;
#define sr string 
#define vc vector
#define fi first
#define se second
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define pque priority_queue
#define bpc(a) __builtin_popcount(a)
int main(){
  int n;cin>>n;
  ll ans=(ll)n*(n+1)/2;
  int t=30;
  vc<map<int,int>>v(t);
  vc<map<int,int>>x(t);
  vc<int>vv(n); rep(i,n)cin>>vv[i],vv[i]--;
  rep(i,t)v[i][0]=1;
  rep(i,t)if(vv[0]!=i)x[i][0]=1;
  vc<int>s(t,0);
  rep(j,n){
    int a=vv[j];
    rep(i,t){
      s[i]+=a-i;
      ans-=v[i][s[i]];
      if(a!=i)ans+=x[i][s[i]];
      v[i][s[i]]++;
      if(j+1<n&&vv[j+1]!=i)x[i][s[i]]++;
    }
  }
  ans++;
  cout<<ans;
}