// editor1
#include<stdio.h>
#include<stdlib.h>
typedef struct Node{
    int data;
    struct Node *next;
}node;

struct *head=NULL,*tail=NULL;
int create(int num){
    node *newnode = (node*)malloc(sizeof(node));
    newnode->data=num;
    newnode->next=NULL;
    
    if(head == NULL){
        head=newnode;
        tail=newnode;
    }
    else{
        tail->next=newnode;
        tail=newnode;
    }
}

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

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