Hm nay v 32 hm sau cht 76, 98. Ghi nh lt ¨¢nh i th T¨¬m hiu sn thi u: S c¨® s kh¨¢c nhau ln gia hai i tham gia thi u sn nh¨¤ hay sn kh¨¢ch. iu n¨¤y nh hng ti tm l v¨¤ c v ca kh¨¢n gi. Ch¨² iu n¨¤y cng gi¨²p cho m¨¤n c¨¢ cc tr n¨ºn d d¨¤ng hn. Chi l¨¨o: Chi b¨¤i c¨´ng m¨¤u vi 3 l¨¢ c¨® sn tng c hi thng cc. Mt kh¨¢i nim m¨¤ ngi chi cn nm trong b¨¤i tin l¨ºn ch¨ªnh l¨¤ b t qu. y l¨¤ mt t hp gm c¨® 4 l¨¢ c¨´ng gi¨¢ tr v¨¤ y c¨¢c cht t C, R, Chun, B¨ªch. V¨ª d: T qu 6 bao gm: 6 C, 6 R, 6 Chun, 6 B¨ªch. C¨¢ch chi b¨¤i phm thng minh l¨¤ kt hp chin thut gi phm v¨¤ gim im tha. Mt phm ln c¨® gi¨¢ tr t 3 ¨C 9 im, t¨´y l¨¢. Vic to phm sm gi¨²p tng kh nng thng cui v¨¢n. Qun l ngn s¨¢ch: Khi tham gia chi, bn cn chn mc cc ph¨´ hp vi bn thn tr¨¢nh ri ro khng ¨¢ng c¨®. Vic t cc hp l s gi¨²p hi vi¨ºn c¨® th duy tr¨¬ ngun t¨¤i ch¨ªnh. Nu khi c¨® mt k¨¨o bt k b thua th¨¬ ta ly c h s xi¨ºn chia cho 2. iu n¨¤y s gi¨²p cho bn c¨® th d o¨¢n c l¨¤ b¨¤i m¨¤ i th ang nm gi khi gn cui v¨¢n. Nh nhng d o¨¢n n¨¤y bn c¨® th a ra phng ¨¢n v¨¤ l¨¢ ph¨´ hp d¨¤nh chin thng. Xp snh 3 ao Odd xi¨ºn = H s k¨¨o thng x [(h s k¨¨o n ¨C 1)/2] x ( nu k¨¨o thua na) x 1 (nu k¨¨o h¨°a) x ¡­vi h s k¨¨o n. ngu-linh-voi-xi-ban-cai-nao-lon-hon

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