#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000000LL


int main(){
	
	int n;
	cin>>n;
	vector<long long> a(n);
	rep(i,n){
		cin>>a[i];
	}
	
	long long ans = n;
	ans *= n+1;
	ans /= 2;
	ans++;
	
	for(int i=1;i<=30;i++){
		
		rep(j,2){
			map<int,long long> mp;
			if(a[0]!=i || j==0){
				mp[0]++;
			}
			long long cur = 0;
			rep(k,n){
				cur += a[k]-i;
				if(a[k]==i){
					ans -= mp[cur];
				}
				if(k!=n-1 && a[k+1]==i){
					if(j==0)mp[cur]++;
				}
				else mp[cur]++;
			}
			reverse(a.begin(),a.end());
		}
		
	}
	cout<<ans<<endl;
	
	
	return 0;
}