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  #16  
Old 06-14-2008, 08:46 AM
cbk1994 cbk1994 is offline
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Quote:
Originally Posted by Programmer View Post
Time: 0.001927852
Aww, mine was 0.008700847 seconds.

Of course, I was trying to make mine inefficient, for some reason ...
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  #17  
Old 06-14-2008, 03:14 PM
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Quote:
Originally Posted by cbk1994 View Post
Aww, mine was 0.008700847 seconds.

Of course, I was trying to make mine inefficient, for some reason ...
Perhaps too many nested loops?
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  #18  
Old 06-14-2008, 07:50 PM
Tolnaftate2004 Tolnaftate2004 is offline
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Quote:
Originally Posted by Programmer View Post
Picky, Picky.

PHP Code:
function onCreated()
{
  
this.start timevar2;
  
  
this.incompatability = {
    {
102284},
    {
392126},
    {
12},
    {
34},
    {
56},
    {
78}
  };
  
  
  
this.studentsSelected.clear();
  
this.studentGroups.clear();
  
  
numStudentsSelected 0;
  
// Select students at random
  
for (0100i++)
  {
    
int(random(0400));
    
    if (
this.studentsSelected.index(f) == -1)
    {
      
this.studentsSelected.add(f);
    } else
    {
      
i--; continue;
    }
  }
  
  
// Group them
  
for (0this.studentsSelected.size(); += 2)
  {
    
this.studentGroups.add({this.studentsSelected[i], this.studentsSelected[i+1]});
  }
  
  
// Remove incompatabilities
  
for (050i++)
  {
    
sGroup this.studentGroups[i];
    
    for (
0this.incompatability.size(); a++)
    {
      if ((
sGroup[0] == this.incompatability[a][0] || sGroup[0] == this.incompatability[a][1]) && (sGroup[1] == this.incompatability[a][0] || sGroup[1] == this.incompatability[a][1]))
      {
        echo(
"INCOMPATABILITY: " sGroup);
        
        
// we've found an incompatability, so lets flip this student with the next group
        
sGroup2 this.studentGroups[i+1];
        
        
sGroup[0] = sGroup2[0];
        
        
this.studentGroups[i] = sGroup;
        
this.studentGroups[i+1] = sGroup2;
        
        
i--;
        continue;
      }
    }
  }
  
  
this.end timevar2;
  
  echo(
this.end this.start);
  
  for (
050i++)
  {
    echo(
"Group " @ (i+1) @ ": {" this.studentGroups[i][0] @ ", " this.studentGroups[i][1] @ "}");
  }

Time: 0.001927852
Once again, this failed to perform the task.
Again, let's discuss what we ought to be doing to solve this problem. This is a very difficult problem to solve (HRs idea, don't blame me).
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  #19  
Old 06-14-2008, 08:03 PM
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Quote:
Originally Posted by Tolnaftate2004 View Post
Today's challenge will include 2 problems:
  1. hard Suppose that you are organizing housing accommodations for a group of four hundred university students. Space is limited and only one hundred of the students will receive places in the dormitory. To complicate matters, the Dean has provided you with a list of pairs of incompatible students, and requested that no pair from this list appear in your final choice.
    The point of this exercise is to GENERATE DISCUSSION. We are not asking you to WRITE the code, merely speculate as to how you might do it. BUT IF YOU FEEL COMPELLED, write the code to accomodate arbitrary lists from the Dean.
  2. easy Solve this problem.
Is it possible for you to write in a little more simple English for me? I don't understand the task quite well, though I'd like to give it a go
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  #20  
Old 06-14-2008, 08:20 PM
cbk1994 cbk1994 is offline
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Quote:
Originally Posted by Dan View Post
Is it possible for you to write in a little more simple English for me? I don't understand the task quite well, though I'd like to give it a go
1. hard You are putting 400 people in houses. Only 100 people will be able to have a house. You have a list of people that can not be in the same house. 2 people must be in each house. Talk about it, don't script it unless you want to.

Is that a bit better?
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  #21  
Old 06-15-2008, 04:49 PM
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Not sure if I entirely understood the task, but I suppose this should work?

PHP Code:
function onCreated() {
  
temp.students_incompatible = {{1,2},{3,49}};
  
temp.students_total = new[400];
  
temp.house_list = {};
  
  while (
temp.house_list.size() < 100) {
    
temp.0;
    while (
temp.students_total[temp.i] == 1)
      
temp.++;
    
temp.students_total[temp.i] = 1;
    
temp.temp.i;
    
    
temp.go false;
    while (
temp.students_total[temp.j] == || !temp.go) {
      if ((@ {
temp.1,temp.1}) in temp.students_incompatible) {
        
temp.go false;
        
temp.++;
      }
      else if ((@ {
temp.1,temp.1}) in temp.students_incompatible) {
        
temp.go false;
        
temp.++;
      }
      else if (
temp.students_total[temp.j] == 1)
        
temp.++;
      else
        
temp.go true;
    }
    
temp.students_total[temp.j] = 1;
    
temp.house_list.add({temp.1,temp.1});
  }
  echo(
temp.house_list);

Time: 0.008579015
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Last edited by Dan; 06-15-2008 at 05:07 PM.. Reason: Added time.
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  #22  
Old 06-15-2008, 05:39 PM
Chompy Chompy is offline
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Uhm, Dan, suppose to be discussion :o
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  #23  
Old 06-15-2008, 06:33 PM
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Quote:
Originally Posted by Chompy View Post
Uhm, Dan, suppose to be discussion :o
Well then this is how I'd make the groups, lol.
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  #24  
Old 06-15-2008, 06:35 PM
Chompy Chompy is offline
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Quote:
Originally Posted by Dan View Post
Well then this is how I'd make the groups, lol.
Try explain it with words instead of code
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  #25  
Old 06-15-2008, 09:17 PM
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Quote:
Originally Posted by Chompy View Post
Try explain it with words instead of code
I want to know if it does what it should do tho (if I did what was needed).
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  #26  
Old 06-16-2008, 07:36 PM
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You are using very small lists Your algorithms are based on the fact that the list is small. If you took your basic ideas and applied them to more complex or impossible lists, they would run much longer then any of our lifetimes.

By impossible, suppose you were given a list of incompatible students that makes it impossible to come up with 100 students.

Your work is cut out for you
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  #27  
Old 06-16-2008, 10:41 PM
cbk1994 cbk1994 is offline
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Quote:
Originally Posted by Kristi View Post
If you took your basic ideas and applied them to more complex or impossible lists, they would run much longer then any of our lifetimes.
No, that's why we have a max loop limit
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  #28  
Old 06-16-2008, 10:48 PM
Kristi Kristi is offline
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Quote:
Originally Posted by cbk1994 View Post
No, that's why we have a max loop limit
You are supposed to assume a limit doesn't exist (in graal this can be achieved with a scheduleevent).
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  #29  
Old 06-16-2008, 11:03 PM
Dan Dan is offline
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Quote:
Originally Posted by Kristi View Post
You are supposed to assume a limit doesn't exist (in graal this can be achieved with a scheduleevent).
OK. Good luck to anyone trying, Dan's not going to invest any more time in this Programming Exercise because there's more work to do .
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  #30  
Old 06-18-2008, 10:46 PM
Stryke Stryke is offline
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Would this work?

PHP Code:
function onCreated()
{
  
this.start timevar2;
  
this.incompatability = {
                         {
23,46},
                         {
29,44},
                         {
45,96},
                         {
11,77},
                         {
2,32},
                         {
1,12},
                         {
13,69},
                         };
  
this.houselist NULL;
  for(
temp.i=0temp.i<100temp.i++)
  {
    
this.intA 0;
    
this.intB 0;
    while(!
this.intA && !this.intB)
    {
      
this.intA int(random(0,400));
      
this.intB int(random(0,400));
      for(
temp.j=0temp.j<100temp.j++)
      {
        if(
this.intA == this.houselist[temp.j][0])
          
this.int 0;
        else if(
this.intA == this.houselist[temp.j][1])
          
this.int 0;
        else if(
this.intB == this.houselist[temp.j][0])
          
this.int 0;
        else if(
this.intB == this.houselist[temp.j][1])
          
this.int 0;
        if(
this.intA == this.incompatibility[temp.j])
          if(
this.intB == this.incompatibility[temp.j])
            
this.int 0;
        else if(
this.intB == this.incompatibility[temp.j])
          if(
this.intA == this.incompatibility[temp.j])
            
this.int 0;
      }
      if(
this.intA == this.intB)
        
this.int 0;
    }
    
this.houselist.add({this.intA,this.intB});
  }
  
this.end timevar2;
}
savelog2("houseList.txt",this.houselist);
echo(
"Time: " this.end this.start); 
Time: 0.026829004

Damn that's slow compared to others lol
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