#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 {
        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,itr;
    scanf("%d ",&size);
    if(size<0) {
        printf("Invalid input");
        return 0;
    }
    for(itr=1;itr<=size;itr++) {
        if(!scanf("%d",&num)){
            printf("Invalid input");
            return 0;
        }
        create (num);
    }
    display();
    return 0;
}
}