#include <iostream>
#include<time.h>
using namespace std;

void main()
{
    setlocale(LC_ALL, "ukr");
    srand(time(NULL));
    const int n = 15;
    bool change = true;
    int arr[n], m = 0;

    for (int i = 0; i < n; i++)
    {
        arr[i] = rand() % 10 - 5;
        cout << arr[i] << " ";
    }
    cout << endl;
    int maxcount = 0;
    for (int i = 0; i < n; i++)
    {
        int count = 0;
        if (arr[i] < 0) {
            for (int j = i; j < n; j++)
            {
                if (arr[j] < 0) {
                    count++;
                    if (count > maxcount) { maxcount = count; }
                    cout << count << " ";
                }
            }
        }
    }
    cout << endl << maxcount << endl;
}

for (int j = i; j < n; j++)
        {
            if (arr[j] < 0) {
                count++;
                if (count > maxcount) { maxcount = count; }

            }else{
                count = 0; //cбрасывать значение count кто будет?
            }
        }

-3 -5 -4 3 4 -5 1 0 -3 -1 -1 -2 -5 -5 0

6

#include <range/v3/all.hpp>

int main()
{
    int v[] { -2, 0, 2, -1, -2, -11, -2, 3, 5, 1, -1, -1, 1, -2, -1, 2 };

    int m = ranges::max(v
        | ranges::view::group_by([](int a, int b){return (a < 0) && (b < 0);})
        | ranges::view::transform(ranges::distance)
    );

    assert(m == 4);
}

int main()
{
    int a[12] {-1, -2, -11, -2, 3, 5, 1, -1, -1, 1, -2, -1};

    unsigned current = 0, maxnegative = 0;

    for (int i = 0; i < 12; ++i) {
        if (a[i] < 0) {
            ++current;
            if (current > maxnegative) maxnegative = current;
        } else {
            current = 0;
        }
    }

    cout << maxnegative << endl;
    return 0;
}

#include <vector>
#include <rxcpp/rx.hpp>

int main()
{
    std::vector<int> v{ -1, -2, -11, -2, 3, 5, 1, -1, -1, 1, -2, -1, 1, 2, 1, 0 };

    auto m = rxcpp::observable<>::iterate(v)
        .scan(0, [](int a, int i) { return (i < 0) ? a + 1 : 0; })
        .scan(0, [](int a, int i) { return std::max<int>(a, i); })
        .distinct_until_changed();

    m | rxcpp::operators::subscribe<int>(rxcpp::util::println(std::cout));
}