Start 2026-01-07 17:36:10

【2026省选】20260107模拟赛更正

End 2026-01-31 00:00:00
Contest is over.
Now 2026-03-28 18:31:37

A. 【BJ】T1

Description

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Output

Examples

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Output

                            

                        


                        
                                            

                

                                                        

            
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                        Time Limit
                        
                            1 second                        
                    

                    

                        Memory Limit
                        512 MB
                    

                    
                

            


            
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