public static void main(String[] args) {
        try (Scanner input = new Scanner(System.in)) {
            input.nextInt();
            List<Integer> numbers = new ArrayList<>();
            while (input.hasNextInt()) {
                numbers.add(input.nextInt());
            }
            System.out.println(getAllContiguousSubarrays(numbers)
            .stream()
                  .filter(list -> list.stream()
                          .mapToInt(e -> e)
                          .sum() < 0)
            .count());
        }
    }
    
private static List<List<Integer>> getAllContiguousSubarrays(List<Integer> list) {

        List<List<Integer>> result = new ArrayList<>();
        for (List<Integer> frontTruncatedSubList : IntStream.range(0,
            list.size())
                 .mapToObj(i -> list.subList(i, list.size()))
                 .collect(Collectors.toList())) {
            result.addAll(IntStream.range(0,
            frontTruncatedSubList.size())
                 .mapToObj(i -> frontTruncatedSubList.subList(0, 
                     frontTruncatedSubList.size() - i))
                 .collect(Collectors.toList()));
        }

        return result;
    }