Solved

Generating a schedule with 30 teams

Posted on 2004-09-21
4
319 Views
Last Modified: 2010-04-17
Hello

Im asking this question here (and not in the Math/Science section) because i need the code (i would prefer Java or C/C++) that will generate a sport team schedule following these rules:

case a:
- There are 30 teams
- Each teams playing 1 time against all other team (so 29 games per team)
- Cannot play twice against the same team
- Schedule must be random (if schedule is twice in a row, the results will differ)

case b:
- There are 30 teams
- Each teams playing 2 times against all other team (so 58 games per team)
- Schedule must be random (if schedule is twice in a row, the results will differ)

Big thanks to all who will try to help me out here.
Thanks

    -Oli
0
Comment
Question by:oroussea
  • 2
4 Comments
 
LVL 84

Accepted Solution

by:
ozo earned 125 total points
ID: 12112443
#include <stdlib.h>
char *teams[]={"team1", "team2", "team3", "team4", "team5", "team6", "team7", "team8", "team9", "team10", "team11", "team12", "team13", "team14", "team15", "team16", "team17", "team18", "team19", "team20", "team21", "team22", "team23", "team24", "team25", "team26", "team27", "team28", "team29", "team30"};
char *games[15];
void shuffle(char *array[],int n){
  int i;
  for( i=n; --i; ){
    int j = rand() % (i+1);
    char *t = array[i];
    array[i] = array[j];
    array[j] = t;    
  }
}
main(){
  int r,s,t;
  for( s=0;s<15; s+=1 ){ games[s] = (char *)malloc(20); }
  srand(time());
  printf("a\n");
  shuffle(teams,30);
  for( r=0;r<29;r++ ){
    for( s=0;s<15;s++ ){
      sprintf(games[s],"%s vs. %s",teams[s?(r+s-1)%29+1:0],teams[(28-s+r)%29+1]);
    }
    shuffle(games,15);
    for( s=0;s<15;s++ ){
      printf("%s\n",games[s]);
    }
    printf("\n");
  }
  printf("b\n");
  shuffle(teams,30);
  for( r=0;r<29;r++ ){
    for( s=0;s<15;s++ ){
      sprintf(games[s],"%s vs. %s",teams[s?(r+s-1)%29+1:0],teams[(28-s+r)%29+1]);
    }
    shuffle(games,15);
    for( s=0;s<15;s++ ){
      printf("%s\n",games[s]);
    }
    printf("\n");
  }
}
0
 

Author Comment

by:oroussea
ID: 12112619
Thanks for the quick reply ozo

But i dont see any diff between A and B...

But A seems to do it...

Thanks

  -Oli
0
 
LVL 84

Expert Comment

by:ozo
ID: 12116490
Isn't case b just case a repeated?
0
 
LVL 100

Expert Comment

by:mlmcc
ID: 12118384
With the second shuffle of the teams the second half schedule should be different from the first half.

That should work unless you want it to be possible for teams 1 & 2 to be able to play back to back games or twice at any time in the season rather than once in the first 29 games and the second game in the last 29 games.

mlmcc

0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

A short article about problems I had with the new location API and permissions in Marshmallow
Today, the web development industry is booming, and many people consider it to be their vocation. The question you may be asking yourself is – how do I become a web developer?
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
In this fourth video of the Xpdf series, we discuss and demonstrate the PDFinfo utility, which retrieves the contents of a PDF's Info Dictionary, as well as some other information, including the page count. We show how to isolate the page count in a…

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question