#include <stdio.h>
#include <stdlib.h>

//a)

typedef struct Point
{
    float X;
    float Y;
}Point;

//c)
int numberOfPoints(int cadran, Point* puncte, int n)
{
    int number, i;
    number = 0;
    switch (cadran)
    {
        case 1:
            for (i = 0; i < n; i++)
                if (puncte[i].X >= 0 && puncte[i].Y >= 0)
                    number++;
            break;
        case 2:
            for (i = 0; i < n; i++)
                if (puncte[i].X < 0 && puncte[i].Y >= 0)
                number++;
            break;
        case 3:
            for (i = 0; i < n; i++)
                if (puncte[i].X < 0 && puncte[i].Y < 0)
                    number++;
            break;
        case 4:
            for (i = 0; i < n; i++)
                if (puncte[i].X >= 0 && puncte[i].Y < 0)
                    number++;
            break;
        default:
            number = -1;
            break;
    }
    return number;
}

void main()
{
    //b)
    int n, i, cadran, numarPuncte;
    Point* puncte;
    printf("n=");
    scanf("%d", &n);
    puncte = (Point*)malloc(n * sizeof(Point));
    for (i = 0; i < n; i++)
    {
        printf("Punctul %d\n", i);
        printf("X=");
        scanf("%f", &puncte[i].X);
        printf("Y=");
        scanf("%f", &puncte[i].Y);
    }
    printf("Cadranul=");
    scanf("%d", &cadran);
    numarPuncte = numberOfPoints(cadran, puncte, n);
    printf("In cadranul %d sunt %d puncte", cadran,numarPuncte); //d)
    free(puncte); //e)
}