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

int main() {
  int N;
  cin >> N;
  vector<int> A(N + 1);
  for(int i = 1; i <= N; i++) {
    cin >> A[i];
  }
  constexpr int M = 30;
  long long ans = (long long) N * (N + 1) / 2;
  for(int x = 1; x <= M; x++) {
    vector<int> B = A;
    for(int i = 1; i <= N; i++) {
      B[i] += B[i - 1] - x;
    }
    map<int, int> mp;
    for(int i = 0; i <= N; i++) {
      if(A[i] == x) ans -= mp[B[i]];
      mp[B[i]]++;
    }
  }
  cout << ans + 1 << endl;
}