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     function search( key : typekey; var r : dataarray ) : integer;
     var i, inc : integer;
     begin
     i := hashfunction( key ) ;
     inc := 0;
     while (inckey) do
          begin
          i := (i+inc+1) mod m;
          inc := inc + 2
          end;
     if r[i].k=key  then search := i    {*** found(r[i]) ***}
               else search := -1;  {*** notfound(key) ***}
     end;
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