// editor2
#include <stdio.h>
#include <stdlib.h>

typedef struct node{
    int head;
    struct node *next;
}Node;

Node *head=NULL, *tail=NULL

void create(int num){
    Node *newnode=(Node*)malloc(1 * sizeof(Node));
    newnode->data=num;
    newnode->next=NULL;
    
    if(head==NULL){
        head=newnode;
        tail=newnode;
    }else{
        tail->next=newnode;
        tail=newnode;
    }
}

void display(){
    struct node *itr;
    for(itr=head;itr!=NULL;itr=itr->next){
        printf("%d",itr->data);
    }
}

int main(){
    int size, num, itr;
    scanf("%d", &size);
    if(size<=0 || size>=100){
        printf("Invalid input");
        return 0;
    }
    for(itr=1;itr<=size;itr++){
        scanf("%d", num);
        create(num);
    }
    display();
}