typedef signed char int8_t;
typedef unsigned char uint8_t;

static struct
{
    int8_t n, p0, p1, p2, p3;
} info;

int8_t getPos3 (int8_t a0, int8_t a1, int8_t a2)
{
    if (1 == a0 && 2 == a1)
        switch (a1)
        {
            case 2:
                return 1;
        }

    return 0;
}

void doAction (int a, int8_t a0, int8_t a1, int8_t a2)
{
    if (1 == a0 && 0 == a1)
        info.n--;
}

void menu_cycle(void)
{
    if (info.p3 < getPos3 (info.p0, info.p1, info.p2) -1)
        doAction (0, info.p0, info.p1, info.p2);
}