#include<stdio.h>
#define MAX 100
int rear=-1,front=-1;
int size;
int arr[MAX];
void enqueue(int num){
    if(rear>front){
        printf("stack is full");
    }
    else{
        arr[++top]=num;
    }
}

void dequeue(){
    if (rear==-1){
        printf("stack is empty");
    }
    else{
        for(int i=front+1;i<=rear;i++){
            printf("%d",arr[i]);
        }
}
int main(){
    int size,num,itr;
    int a;
    scanf("%d",&size);
    for(itr=1;itr<=size;itr++){
        scanf("%d",&num);
        enqueue(num);
        
    }
    dequeue();
    return 0;
}