#include<stdio.h>
#include<stdlib.h>
#define MAX 25

int Queue[MAX];
int top=-1;
int rear=-1;

void enqueue(int num){
    if(top==-1){
        front=0;
    }
    else{
        Queue[++rear]=num;
        
    }
}

void display(){
    int itr;
    for(itr=0;itr<top;itr++){
        printf("%d",Queue[itr]);
    }
}

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