#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
#include <math.h>

int waitingtime(int a){
  int b=(a+1)/125+1;
  if(a==0)
    return 8;
  else
    return b;
}

int servertime(int a){
  if(1<=a&& a<=10)
    return 1;
else
  if(11<=a&& a<=30)
    return 2;
else
  if(31<=a&& a<=60)
    return 3;
  else
    if(61<=a&&a<=85)
      return 4;
else
  if(86 <=a && a<=95)
    return 5;
else
  if(96<=a && a<= 99)
    return 6;
  else return 1;
}

int sum(int* array){
  int s=0;
  for(int i =0;i<20;i++)
    s+=array[i];
  return s;
}

main(){
  int x,y,z;
  int waiting[20];
  int interarrival[20];
  int service[20];
  int servicestarts[20];
  int serviceends[20];
  int spendtime[20];
  int idle[20];
  int arrival[20];

  ofstream fout,ffout;
  fout.open("random.data");
  ffout.open("server.data");

  fout << "$$\\begin{tabular}{ccc@{\\qquad}|@{\\qquad}ccc}" << endl;
  fout << "customer & random digits & time & customer & random digits & time\\\\ \\hline" << endl;
  for(int i=1; i<11; i++)
    {
      fout << i << "& ";
      x=rand()%10;y=rand()%10;z=rand()%10;
      fout << x<< y<< z << "& ";
      interarrival[i-1]=waitingtime(100*x+10*y+z);
      fout << waitingtime(100*x+10*y+z) << "& ";

      fout << i+10 << "& ";
      x=rand()%10;y=rand()%10;z=rand()%10;
      fout << x<< y<< z << "& ";
interarrival[10+i-1]=waitingtime(100*x+10*y+z);
      fout << waitingtime(100*x+10*y+z);
      fout << "\\\\"<< endl;
    }

  arrival[0]=0;

  fout << "\\end{tabular}$$"<< endl;

fout << "$$\\begin{tabular}{ccc@{\\qquad}|@{\\qquad}ccc}" << endl;
  fout << "customer & random digits & time & customer & random digits & time\\\\ \\hline" << endl;
  for(int i=1; i<11; i++)
    {
      fout << i << "& ";
      x=rand()%10;y=rand()%10;
      fout << x<< y<< "& ";
      service[i-1]=servertime(10*x+y);
      fout << servertime(10*x+y) << "& ";

      fout << i+10 << "& ";
      x=rand()%10;y=rand()%10;
      fout << x<< y<< "& ";
      service[10+i-1]=servertime(10*x+y);
      fout << servertime(10*x+y);
      fout << "\\\\"<< endl;
    }

  fout << "\\end{tabular}$$"<< endl;


  arrival[0]=0;
  interarrival[0]=0;

fout << "$$\\begin{tabular}{ccccccccc}" << endl;
  fout << " & & arrival time & service time& service start& waiting time & service ends& time in system& idle time\\\\ \\hline" << endl;
  for(int i=1; i<21; i++)
    {
      // customer number
      ffout << i << "& ";

      // time since last arrival
      ffout << interarrival[i-1] << "& ";


      // arrival time
      if(i==1)
	arrival[i-1]=0;
      else
	arrival[i-1]=arrival[i-2]+interarrival[i-1];
      ffout << arrival[i-1]<<"& ";
	
      // service
      ffout << service[i-1] << "& ";

      // time service begins
      serviceends[0]=service[0];
      if(i!=1)
	{if (arrival[i-1]>serviceends[i-2])
	  servicestarts[i-1]=arrival[i-1];
	else
	  servicestarts[i-1]=serviceends[i-2];
	}
      else
	servicestarts[0]=0;
      ffout<< servicestarts[i-1] << "& ";

      // time to wait
      waiting[i-1]=servicestarts[i-1]-arrival[i-1];
      ffout << waiting[i-1] << "& ";

      // service end
      serviceends[i-1]=servicestarts[i-1]+service[i-1];
      ffout << serviceends[i-1] << "& ";

      // spend time
      spendtime[i-1]=waiting[i-1]+service[i-1];
      ffout << spendtime[i-1]<< "& ";

      // idle 
      if(i==1)      
	idle[0]=0;
      else
	idle[i-1]=servicestarts[i-1]-serviceends[i-2];

      ffout << idle[i-1]<< "\\\\ \\hline"<< endl;

    }

  ffout << "& & & " << sum(service) << "& & "<< sum(waiting) << "& & "<< sum(spendtime) << " & " << sum(idle) << endl;  

}