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

struct Node {
    int data;
    struct Node* prev;
    struct Node* next;
};

struct Node* createNode(int value) {
    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
    newNode->data = value;
    newNode->prev = NULL;
    newNode->next = NULL;
    return newNode;
}

int main() {
    int n, value;
    scanf("%d", &n);

    if (n <= 0 || n > 10) {
        printf("Invalid Input");
        return 0;
    }

    struct Node* head = NULL;
    struct Node* tail = NULL;

    for (int i = 0; i < n; i++) {
        if (scanf("%d", &value)) value < -10000  value > 10000) {
            printf("Invalid Input");
            return 0;
        }

        struct Node* newNode = createNode(value);
        if (head == NULL) {
            head = newNode;
            tail = newNode;
        } else {
            tail->next = newNode;
            newNode->prev = tail;
            tail = newNode;
        }
    }

    struct Node* temp = head;
    while (temp != NULL) {
        printf("%d", temp->data);
        if (temp->next != NULL) printf(" ");
        temp = temp->next;
    }

    return 0;
}