Start 2025-02-07 12:20:06

【2025noip】20250207更正

End 2025-02-28 00:00:00
Contest is over.
Now 2025-12-13 00:25:27

A. 【S】T1

描述

输入

输出

样例

输入


                        

                        

                            
输出

                            

                        


                        
                                            

                

                                            

            
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                        Time Limit
                        
                            2 seconds                        
                    

                    

                        Memory Limit
                        512 MB
                    

                    
                

            


            
                 Submit