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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    long long N; cin >> N;
    vector<long long> A(N);
    for(auto &a : A) cin >> a;

    vector<vector<long long>> sepa(31);
    for(long long i=0; i<N; i++) sepa.at(A.at(i)).push_back(i);

    long long answer = 1;
    for(long long i=1; i<=30; i++){
        long long pos = 0,zero = 0;
        map<long long,long long> M;
        for(auto &p : sepa.at(i)){
            while(pos < p) M[zero]++,zero -= A.at(pos++)-i;
            answer += p-M[zero];
        }
    }
    cout << answer << endl;
}