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

struct ll {
    int value;
    struct ll* next;
};


struct ll* na_zaciatok(struct ll * first,int value) {
    struct ll* prvy = calloc(1,sizeof(struct ll));
    prvy->value = value;
    prvy->next = first;
    return prvy;
}

struct ll* na_koniec(struct ll * first,int value) {
    struct ll* nova = calloc(1,sizeof(struct ll));
    nova->value = value;
    if (first == NULL){
        return nova;
    }
    struct ll* this = first;
    while(this->next != NULL){
        this = this->next;
    }
    this->next = nova;
    return first;
}

void print_ll(struct ll* first){
    struct ll* this = first;
    while(this != NULL){
        printf("%d\n",this->value);
        this = this->next;
    }
    printf("------\n");
}

void clear(struct ll* first){
    struct ll* this = first;
    while(this != NULL){
        struct ll* next = this->next;
        free(this);
        this = next;
    }
}

int main(){
    struct ll* zoznam = NULL;
    na_koniec(zoznam,20);
    for (int i = 0; i < 10; i++){
        zoznam = na_zaciatok(zoznam, i);
        print_ll(zoznam);
    }
    zoznam = na_koniec(zoznam,123);
    clear(zoznam);
    return 0;
}