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

typedef struct node{
    int x,y;
    struct node * next;
}CVOR;


int main()
{
    CVOR * kek;
    CVOR * prva;
    int xt, yt;

    kek = (CVOR *)malloc(sizeof(CVOR));
    prva = kek;
    while(1){

    printf("X:");
    scanf("%d", &xt);
    printf("Y:");
    scanf("%d", &yt);

    if (xt != 0 && yt != 0) {
            kek->x = xt;
            kek->y = yt;
            kek->next = (CVOR *) malloc(sizeof(CVOR));
            kek = kek->next;
        } else {
        kek->x = xt;
            kek->y = yt;
            kek->next = NULL;
            kek = prva;
            break;
        }
    }
    while(kek->next != NULL) {
        printf("X = %d\n", kek->x);
        printf("Y = %d\n", kek->y);
        if (kek->x > 0){
            if(kek-> y > 0) printf("Prvi kvadrant\n");
            else printf("Cetvrti kvadrant\n");
        }
        else if (kek-> x < 0) {
            if(kek-> y > 0) printf("Drugi kvadrant\n");
            else printf("Treci kvadrant\n");
        }

        kek = kek->next;
        }

    return 0;
}