Start 2024-11-19 13:28:35

【2024NOIP】20241119更正

End 2024-11-30 00:00:00
Contest is over.
Now 2025-12-13 00:25:28

D. 【S】T4

Description

Input

Output

Examples

Input


                        

                        

                            
Output

                            

                        


                        
                                            

                

                                                        

            
Submit

            

                                                            

  
Login

  

    

        




        




        

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                        Time Limit
                        
                            2 seconds                        
                    

                    

                        Memory Limit
                        1024 MB
                    

                    
                

            


            
                 Submit