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import mpjdev.*;
import mpjbuf.*;
import mpi.*;
import java.util.Arrays;
public class Group_union {
public static void main(String args[]) throws Exception{
MPI.Init(args);
Group grp = MPI.COMM_WORLD.Group();
int[] incl1 = {4,0,5};
int[] incl2 = {6,7,4};
Group grp1 = grp.Incl(incl1);
Group grp2 = grp.Incl(incl2);
Group grp3 = null;
try { Thread.currentThread().sleep(1000); }catch(Exception e){}
if(grp.Rank()==0 || grp.Rank()==4 || grp.Rank()==5 || grp.Rank()==6 || grp.Rank()==7) {
System.out.println("<"+grp.Rank()+">1<"+grp1+">2<"+grp2+">\n");
grp3 = Group.Union(grp1,grp2);
//System.out.print("gr<"+grp.Rank()+">:ngr<"+ngrp.Rank()+">\n");
System.out.print("gr<"+grp.ids[grp.Rank()].rank()+">:ngrp<"+grp3.ids[grp3.Rank()].rank()+">\n");
System.out.println("grp3.size "+grp3.Size());
/*
System.out.print("gr<"+grp.ids[grp.Rank()].uuid()+">:ngrp<"+grp3.ids[grp3.Rank()].uuid()+">\n");
for(int i=0 ; i<grp3.ids.length ; i++) {
System.out.print("grp3{"+grp3.Rank()+"}<"+grp3.ids[i].uuid()+">\n");
}*/
}else {
//System.out.print("<"+grp.Rank()+">");
}
try { Thread.currentThread().sleep(1000); }catch(Exception e){}
MPI.Finalize();
}
}
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