#include <stdio.h>

int main()
{
	int i, N, A[100001];
	scanf("%d", &N);
	for (i = 1; i <= N; i++) scanf("%d", &(A[i]));
	
	int k, sum, num[6000001];
	long long ans = (long long)N * (N - 1) / 2 + 1;
	for (k = 1; k <= 30; k++) {
		for (i = 0; i <= N * 60; i++) num[i] = 0;
		for (i = 1, sum = 0, num[N*30] = 1; i <= N; i++) {
			if (A[i] == k) ans -= num[sum + N * 30] - 1;
			sum += A[i] - k;
			num[sum + N * 30]++;
		}
	}
	printf("%lld\n", ans);
	fflush(stdout);
	return 0;
}