#include<stdio.h>
int size,top=-1;
int arr[5];
int isfull(){
    if(top==size-1){
        return 1;
    }
    else
    return 0;
}
void enqueue(int num){
    if(top==size-1){
        printf("Queue is full");
    }
    else{
        arr[++top]=num;
    }
}
void traverse)(){
    for(int i=0;i<=top;i++){
        printf("Invalid input")
    }
}
int main(){
    int itr,num;
    scanf("%d",&size);
    if(size<0){
        printf("Invalid input");
        return 0;
    }
    for(itr=1;itr<=size;itr++);{
        scanf("%d",&num);
        enqueue(num);
    }
    traverse();
    return 0;
}