Namisplayingwithastringonhiscomputer.ThestringconsistsofnlowercaseEnglishletters.Itismeaningless,soNamdecidedtomakethestringmorebeautiful,thatistomakeitbeapalindromebyusing4arrowkeys:left,right,up,down.Thereisacursorpointingatsomesymbolofthestring.Supposethatcursorisatpositioni(1 ≤ i ≤ n,thestringuses1-basedindexing)now.Leftandrightarrowkeysareusedtomovecursoraroundthestring.Thestri...
赛前不知道做啥,不想打游戏,就找点easy的题练手,水了7题。。。「codechefCHEFGR」ChefandGround[crayon-68ad29ccc293b166249587/]「codechefPRPOTION」MagicalGirlandColoredLiquidPotions[crayon-68ad29ccc2944229020001/]「codechefFATCHEF」Remypaintsthefence[crayon-68ad29ccc2949516759737/]「codechefCHEFLR」ChefandLeft-Right[crayon-68ad29ccc294d489623546/]「codechefDIS...
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