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

struct nodeStruct
{
    int valX, valY;
    struct nodeStruct* next;
};

typedef struct nodeStruct node;

void push(node** hd, int vx, int vy){
    node* temp;
    temp = (node*)malloc(sizeof(node));
    temp -> valX = vx;
    temp -> valY = vy;
    temp -> next = *hd;
    *hd = temp;
}

void pop(node** hd){
    if(hd == NULL){
        printf("%s %c", "No solution available, exiting program.");
        exit(-1);
    }
    node* temp = (*hd) -> next;
    free(*hd);
    if(temp == NULL){
        printf("%s %c", "No solution available, exiting program.");
        exit(-1);
    }
    *hd = temp;
}

int main(int argc, char **argv){
    node* p = NULL;
    push(&p, 1, 5);
    push(&p, 3, 6);
    pop(&p);
    printf("%i %s %i\n", p->valX, " ", p->valY/*, " ", p->next->valX, " ", p->next->valY*/);
    push(&p, 4, 9);
    printf("%i %s %i %s %i %s %i\n", p->valX, " ", p->valY, " ", p->next->valX, " ", p->next->valY);
    return 0;
}