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

typedef struct DCVOR{
	int br;
	struct DCVOR *sl;
	struct DCVOR *pr;
}dCVOR;


dCVOR *napravi(int br){
	dCVOR *novi=(dCVOR*)malloc(sizeof(dCVOR));
	if(novi==NULL)
        	exit(EXIT_FAILURE);
	novi->br=br;
	novi->sl=NULL;
	novi->pr=NULL;
	return novi;
}

dCVOR *dodajp(dCVOR *pl,dCVOR **kl, int br){
	if(pl==NULL){
		pl=napravi(br);
		*kl=pl;
		return pl;
	}else{
		dCVOR *novi=napravi(br);
		novi->sl=pl;
		pl->pr=novi;
		return novi;
	}
}

int main(){
	dCVOR *pl;
	dCVOR *kl;
	dCVOR *pom;
	int i;
	pl=NULL;
	kl=NULL;
	for(i=0; i<10; i++)
		pl=dodajp(pl,&kl,i);
	pom=pl;
	while(pom!=NULL){
		printf("%d\t",pom->br);
		pom=pom->sl;
	}
	printf("\n");
	pom=kl;
	while(pom!=NULL){
		printf("%d\t",pom->br);
		pom=pom->pr;
	}
	printf("\n");
	return 0;
}