#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *next;
}Node;
Node *head=NULL, *tail;
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{
        head->next=newnode;
        head=newnode;
    }
}
void display(){
    Node*i;
    for(i=head;i!=NULL;i=i->next){
        printf("%d",i->data);
    }
int main(){
    int a,size;
    scanf("%d",&size);
    if(size<0){
        printf("Invalid input");
    }
    for(a=0;a<size;a++){
        scanf("%d",&size);
        create(size);
    }
    display();
    return 0;
}
}