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

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

struct Node* createNode(int data) {
    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
    newNode->data = data;
    newNode->next = NULL;
    return newNode;
}
void printlist(struct Node* head) {
    struct Node* temp =head;
    while (temp != NULL){
        printf("%d", temp->data);
        temp = temp->next;
    }
}
int main(){
    int n;
    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++){
        int x;
        if (scanf("%d", &x) !=1 || x < -100 || x > 1000) {
            printf("Invalid input");
            return 0;
        }
        struct Node* newNode = createNode(x);
        if(head == NULL) {
            head = newNode;
            tail = newNode;
        }
        else{
            tail->next=newNode;
            tail = newNode;
        }
    }
    printList(head);
    return 0;
}