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

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

void insert(struct List **root, int value) {
    if (*root == NULL) {
        *root = (struct List*)malloc(sizeof(struct List));
        (*root)->value = value;
        (*root)->next = NULL;
    } else {
        struct List *tmp = (struct List*)malloc(sizeof(struct List));
        tmp->value = value;
        tmp->next = *root;
        *root = tmp;
    }
}

void print(struct List *root) {
    while (root->next != NULL) {
        printf("%d, ", root->value);
        root = root->next;
    }

    printf("%d\n", root->value);
}

int main() {
    struct List *list = NULL;

    for (int i = 0; i < 10; i++) {
        insert(&list, i);
    }

    print(list);

    return 0;
}