#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, tmp;
	long long ans = (long long)N * (N - 1) / 2 + 1;
	for (k = 1; k <= 30; k++) {
		for (i = 1, sum = 0, tmp = 0; i <= N; i++) {
			if (A[i] == k) ans -= tmp;
			sum += A[i] - k;
			if (sum == 0) tmp++;
		}
	}
	printf("%lld\n", ans);
	fflush(stdout);
	return 0;
}