//最終鬼畜確認トール🔨
#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <unordered_map>
#include <tuple>
#include <cstdio>
#include <cmath>
#include <cassert>
#define rep(i, n) for(i = 0; i < n; i++)
#define int long long
using namespace std;

int n;
int a[100000];

signed main() {
	int i;

	cin >> n;
	rep(i, n) cin >> a[i];

	assert(1 <= n && n <= 100000);
	int minA = a[0], maxA = a[0];
	rep(i, n) minA = min(minA, a[i]);
	rep(i, n) maxA = max(maxA, a[i]);
	assert(1 <= minA && maxA <= 30);

	vector<int> ra(n + 1);
	int ans = n * (n + 1) / 2;
	for (int x = minA; x <= maxA; x++) {
		ra[0] = 0;
		rep(i, n) {
			ra[i + 1] = ra[i] + a[i] - x;
		}

		vector<int> rb = ra;
		rb.erase(unique(rb.begin(), rb.end()), rb.end());

		sort(ra.begin(), ra.end());
		sort(rb.begin(), rb.end());

		/*cout << "x: " << x << endl;
		rep(i, n + 1) { cout << ra[i] << " "; } cout << endl;
		rep(i, rb.size()) { cout << rb[i] << " "; } cout << endl;
		*/

		int cnt = 0;
		rep(i, n + 1) {
			if (i > 0 && ra[i] != ra[i - 1]) {
				ans -= cnt * (cnt - 1) / 2;
				cnt = 0;
			}
			cnt++;
		}
		ans -= cnt * (cnt - 1) / 2;

		cnt = 0;
		rep(i, rb.size()) {
			if (i > 0 && rb[i] != rb[i - 1]) {
				ans += cnt * (cnt - 1) / 2;
				cnt = 0;
			}
			cnt++;
		}
		ans += cnt * (cnt - 1) / 2;
	}
	ans++; //初期状態の分を足す

	cout << ans << endl;
	return 0;
}