package simulation;

import java.io.*;

class Singlechannel
{	public static void main(String a[])throws Exception
	{	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		float avgser=0,qavg=0,savg=0;
		int i,no,wcount=0,icount=0,j;
		System.out.println("ENTER THE NUMBER OF CUSTOMERS.");
		no=Integer.parseInt(br.readLine());
		int arrival[]={1,2,3,4,5,6,7,8};
		int arrivalrda[]=new int[arrival.length];
		float cumarrival[]=new float[arrival.length];		
		float arrivalprob[]={0.125f,0.125f,0.125f,0.125f,0.125f,0.125f,0.125f,0.125f};
		int arrivaltime[]=new int[no];
		int service[]={1,2,3,4,5,6};
		float serviceprob[]={0.10f,0.20f,0.30f,0.25f,0.10f,0.05f};
		float servicecum[]=new float[service.length];
		int servicerda[]=new int[service.length];
		int servicetime[]=new int[no];
		int randomarrival[]=new int[no];
		int randomservice[]=new int[no];
		int interarrival[]=new int[no];
		int starttime[]=new int[no];
		int endtime[]=new int[no];
		int ttq[]=new int[no];
		int tts[]=new int[no];
		int idletime[]=new int[no];
		for(i=0;i<arrival.length;i++)
		{	if(i==0)
			{	cumarrival[i]=arrivalprob[i];
				arrivalrda[i]=(int)(cumarrival[i]*100);
			}
				
			else
			{	cumarrival[i]=cumarrival[i-1]+arrivalprob[i];
				arrivalrda[i]=(int)(cumarrival[i]*100);
			}
		}
		for(i=0;i<service.length;i++)
		{	if(i==0)
			{	servicecum[i]=serviceprob[i];
				servicerda[i]=(int)(servicecum[i]*100);
			}
			else
			{	servicecum[i]=servicecum[i-1]+serviceprob[i];
				servicerda[i]=(int)(servicecum[i]*100);
			}
		}
		randomservice[0]=(int)(Math.random()*100d);
		for(i=1;i<no;i++)
		{	randomarrival[i]=(int)(Math.random()*100d);
			randomservice[i]=(int)(Math.random()*100d);
		}
		for(i=1;i<no;i++)
		{	for(j=0;j<arrivalrda.length;j++)
			{	if(randomarrival[i]==0)
				{	arrivaltime[i]=arrival[arrival.length-1];
					break;
				}
				if(randomarrival[i]<=arrivalrda[j])
				{	arrivaltime[i]=arrival[j];
					break;
				}
			}
			interarrival[i]=interarrival[i-1]+arrivaltime[i];
		}
		for(i=0;i<no;i++)
		{	for(j=0;j<servicerda.length;j++)
			{	if(randomservice[i]==0)
				{	servicetime[i]=service[service.length-1];
					break;
				}
				if(randomservice[i]<=servicerda[j])
				{	servicetime[i]=service[j];
					break;
				}
			}
		}
		for(i=0;i<no;i++)
		{	if(i==0)
			{	starttime[i]=0;
				endtime[i]=starttime[i]+servicetime[i];
				tts[i]=servicetime[i];
			}
			else
			{	if(endtime[i-1]>=interarrival[i])
				{	ttq[i]=endtime[i-1]-interarrival[i];
					starttime[i]=endtime[i-1];
					endtime[i]=starttime[i]+servicetime[i];
					tts[i]=servicetime[i]+ttq[i];
				}
				else 
				{	idletime[i]=interarrival[i]-endtime[i-1];
					starttime[i]=interarrival[i];
					endtime[i]=starttime[i]+servicetime[i];
					tts[i]=servicetime[i];
				}
			}
		}
		for(i=0;i<no;i++)
		{	avgser=avgser+servicetime[i];
			qavg=qavg+ttq[i];
			savg=savg+tts[i];
			if(ttq[i]>0)
				wcount++;
			if(idletime[i]>0)
				icount++;
		}
		System.out.println("No.\tRDA.\tARR.\tIARR.\tRDS.\tPSTAT.\tSERT.\tPEND.\tTSQ.\tIDLW.\tTIS.");
		System.out.println("---------------------------------------------------------------------------------------------------");
		for(i=0;i<no;i++)
		{	System.out.println((i+1)+"\t"+randomarrival[i]+"\t"+arrivaltime[i]+"\t"+interarrival[i]+"\t"+randomservice[i]+"\t"+starttime[i]+"\t"+servicetime[i]+"\t"+endtime[i]+"\t"+ttq[i]+"\t"+idletime[i]+"\t"+tts[i]);
			System.out.println("---------------------------------------------------------------------------------------------");
		}		
		System.out.println("PERFORMANCE OF THE SYSTEM IS AS FOLLOWS:");
		System.out.println("AVERAGE SERVICE TIME:"+(avgser/no));
		if(wcount>0)
			System.out.println("AVERAGE WAITING TIME OF THE CUSTOMER IS:"+(qavg/wcount));
		System.out.println("PROBABILITY OF WAITING IS:"+((float)wcount/no));
		System.out.println("AVERAGE TIME SPENT BY CUSTOMER IN THE SYSTEM IS:"+(savg/no));
		System.out.println("PROBABILITY OF IDLE SERVER IS:"+((float)icount/no));
	}
}