#include<stdio.h>
#define max

int arr[max];
int front =-1, rear =-1;

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

void display(){
    if(front==-1 && rear==-1){
        printf("Invalid input");
    }
    else{
        for(int i=front;i<=rear;i++){
            printf("%d ",arr[i]);
        }
    }
}

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