#include<stdio.h>
#define max 100
typedef struct Node{
    int val;
    int id;
    struct Node *next;
}node;
int queue[max];
int front=-1,rear=-1;
void enqueue(int num){
    if(rear==0){
        printf("No passengers");
        return ;
    }
    queue[++rear]=num;
}
void dequeue(){
    if(front==-1){
        printf("Queue is empty");
        return ;
    }
    
}

int main(){
    int n;
    scanf("%d",&n);
    for(int i=0;i<n;i++){
        
    }