int lvl1 = 0;
int lvl2 = 0;
int lvl3 = 0;

void inc3(int *arr, int val)
{
    lvl3++;
    arr = (int *)realloc(arr, sizeof(int) * lvl3);
    arr[lvl3 - 1] = val;
}

void inc2(int **arr, int val)
{
    lvl2++;
    arr = (int **)realloc(arr, sizeof(int) * lvl2);
    inc3(arr[lvl2 - 1], val);
}

void inc1(int ***arr, int val)
{
    lvl1++;
    arr = (int ***)realloc(arr, sizeof(int) * lvl1);
    inc2(arr[lvl1 - 1], val);
}

void main()
{
        int ***arr = NULL;
        inc1(arr, 10);
}