// editor4
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct*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{
        tail->next=newNode;
        tail=newNode;
    }
}
void display(){
    Node*i;
    for(i=head;i!=NULL;i=i->next){
        printf("%d",i->data);
}
}
int main(){
    int size,num,i;
    scanf("%d",&size);
    for(i=1;i<=size;i++){
        scanf("%d",&num);
    }
    if(size<0){
        printf("Invalid input");
    }
    create(num);
    display();
    return 0;
}
    }
}