#pragma once

typedef struct DiskRequest {
	struct DiskRequest *next;
	int position;
	int time;
} DiskRequest;

typedef struct DiskQueue {
	DiskRequest *head;
	int size;
} DiskQueue;

typedef enum DiskDirection {
	UP, DOWN
} DiskDirection;

DiskQueue *createDiskQueue();

void enqueue(DiskQueue *queue, int time, int position);

void delete(DiskQueue *queue, DiskRequest request);

DiskRequest peek(DiskQueue *queue);

DiskRequest *dequeue(DiskQueue *queue);

DiskRequest *findClosest(DiskQueue *queue, int position, double time);

void destroyDiskQueue(DiskQueue *queue);

int calcDistance(int position, int destination);