#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#define MAX_QUEUE 45
int queue[MAX_QUEUE];
int front=0;
int rear=-1;
int size=0;
void enqueue(int slipNumber){
    if(size,MAX_QUEUE){
        rear=(rear+1)%MAX_QUEUE;
        queue[rear]=slipNumber;
        size++;
    }
}
int dequeue(){
    if(size>0){
        int patient=queue[front];
        front=(front+1)%MAX_QUEUE;
    }
}