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                    2006
                
            
            
                2 Nov
                
                '06
                
            
            
            
        
    
                9:48 a.m.
            
        Thank you for replying. Smart method! I've learned much;-) I'll have a try using UArray. Also, I guess my code still waste too much time "parsing" input (I compiled my code with -prof flag on)... Maybe ByteString may save me (or a smarter brain), What is your opinion about doing faster IO, would you please tell me?