Have no idea what's wrong
I used simple plan with massive of relations and recursive function that checks all ancesters (only up moving) and all descendants (only down moving). There is some part of code in C++:

int checkforblood(int index, int** mas, int* checkmas, int range, int direct) {
    if (checkmas[index - 1] == 1) return 0;
    checkmas[index-1] = 1;
    for (int i = 0; i < range; i++) {
        if (( mas[i][0] == index )&&(direct > -1)) {
            checkforblood(mas[i][1], mas, checkmas, range, 1);
        }
        if (( mas[i][1] == index ) && (direct < 1)) {
            checkforblood(mas[i][0], mas, checkmas, range, -1);
        }
    }
    return 0;
}

I can't see the problem, so if you can't too i will know, that problem in output method.

Edited by author 31.05.2022 02:26