%cache = ();
sub f {
   my ($x, $y, $z) = @_;
   my $key = join("-", @_);
   return $cache{$key} = defined($cache{$key}) ? $cache{$key} : 
      ($x <= $y ?  $z :  f( f($x - 5, $y, $z), f($y - 5, $z, $x), f($z - 5, $x, $y)  ) );
}
while(<>){
  print( f(split()), "\n");
}