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posted @ 2019-03-10 11:26 cloud_9 ÔĶÁ(192) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ¸ø¶¨Á½¸ö´øͨÅä·ûµÄ´®,Çó¿ÉÄܳöÏÖ¼¸´ÎÆ¥Åä,ÒÔ¼°ÕâЩƥÅäλÖà Hint: $n \le 3 10^5$ Solution: ¶¨ÒåÆ¥Å亯Êý $P(x)=\sum_{i=x}^{x+m}(S1[i] S2[i])^2 S1[i] S2[i]?$ Õ¹¿ªµÄʽ×ÓÌ«³¤,ÓÐʱ¼äÔÙ·Å ´ó¸ÅÊÇ ÔĶÁÈ«ÎÄ
posted @ 2019-03-10 11:18 cloud_9 ÔĶÁ(120) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ¸ø³ön¸öÊýqi£¬ ¸ø³öFjµÄ¶¨ÒåÈçÏ£º$F_j = \sum_{ij}\frac{q_i q_j}{(i j)^2 }$ ÁîEi=Fi/qi£¬ÇóEi. Hint: $n \le 10^5$ Solution: $F_j=\sum_{i=1}^{j 1} f(i) g(j i ÔĶÁÈ«ÎÄ
posted @ 2019-03-10 10:54 cloud_9 ÔĶÁ(121) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ÓÐnÉÈÃÅ,ÿÉÈÃÅÉÏÓÐÒ»¸öλÔËËã·û(&,|,^) ºÍÒ»¸öȨֵ,ÒªÇóºÏÀíµÄÑ¡ÔñÒ»¸ö²»³¬¹ýmµÄÊý,ʹÆ䰴˳Ðò¾­¹ýÕâЩÃŵÄÔËËãºó×î´ó Hint: $n \le 10^5$ Solution: ¿¼ÂDzðλ,·Ö±ðÁîÿһλһ¿ªÊ¼ÊÇ0/1,¾­¹ýÔËËãºóµÃµ½µÄÊÇʲô È»ºó´Ó¸ßλ̰ÐÄ,ÈôÔËËãºóΪ1 ÔĶÁÈ«ÎÄ
posted @ 2019-03-09 08:41 cloud_9 ÔĶÁ(211) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ¸ø¶¨Ò»¸ön¸öµãµÄÊ÷,a56爆大奖在线娱乐µãÓÐÒ»¸ö²Ù×÷·ûºÅ "&" "|" "^" ,ÒÔ¼°Ò»¸öȨֵ ÒªÇóÖ§³ÖÒÔϲÙ×÷: 1.ÐÞ¸ÄxµãµÄ²Ù×÷·ûºÅºÍȨֵ 2.¸ø¶¨w,ÄãÐèÒªÕÒÒ»¸öÊýv,¾­¹ý´Óxµ½yµÄ·¾¶ÉϵÄËùÓÐÔËËãºóʹ´ð°¸×î´ó,Êä³öÕâ¸ö´ð°¸ Hint: $n \le 10^5$ Solution ÔĶÁÈ«ÎÄ
posted @ 2019-03-09 08:31 cloud_9 ÔĶÁ(191) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ±´Ü类ũÃñÃDZƽøÁËÒ»¸öƫƧµÄÅ©³¡¡£Å©³¡¿ÉÊÓΪһ¿ÃÓÐ $N$ ¸ö½áµãµÄÊ÷£¬½áµã·Ö±ð±àºÅΪ $1,2,\ldots, N$ ¡£a56爆大奖在线娱乐Ò¶×Ó½áµã¶¼ÊdzöÈë¿Ú¡£¿ªÊ¼Ê±£¬a56爆大奖在线娱乐³öÈë¿Ú¶¼¿ÉÒÔ·ÅÒ»¸öÅ©Ãñ£¨Ò²¿ÉÒÔ²»·Å£©¡£a56爆大奖在线娱乐ʱ¿Ì£¬±´ÜçºÍÅ©Ãñ¶¼¿ÉÒÔÒƶ¯µ½ÏàÁÚµÄÒ»¸ö½áµã¡£Èç¹ûijһʱ¿ÌÅ©ÃñÓë±´ÜçÏàÓöÁË£¨ ÔĶÁÈ«ÎÄ
posted @ 2019-03-08 20:22 cloud_9 ÔĶÁ(296) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ¸ø¶¨Ò»¿ÃÊ÷,ÿ´ÎɾȥҶ×Ó,ÓÐm¸öÏÞÖÆ,·Ö±ðΪ(a,b)a56爆大奖在线娱乐aÐèÒª±ÈbÏÈɾ,Ϊa56爆大奖在线娱乐µãÄÜ·ñ³ÉΪ×îºó±»É¾µÄµã Hint: $n,m \le 10^5$ Solution: ÊÖÄ£ºó»á·¢ÏÖÒ»¸öÊ®·Ö²»ÏÔÈ»µÄ¹æÂÉ: Èôa±ÈbÏÈɾ,ÔòaÔÚÒÔbΪ¸ùµÄ×ÓÊ÷Öеĵã,¶¼²»ÄÜ×îºóɾ, ÓÚÊÇÕâÑù¾Íת»¯ ÔĶÁÈ«ÎÄ
posted @ 2019-03-08 20:01 cloud_9 ÔĶÁ(293) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ¸ø¶¨Ò»¿ÃÊ÷,ÿ´ÎѯÎÊu½ÚµãÔÚÒÔvΪ¸ùʱµÄ×ÓÊ÷Ȩֵ×î´óÖµ Hint: $n \le 10^5$ Solution: Õâ¸öÄ£ÐÍ»¹ÊǺÜÖØÒªµÄ ¿¼ÂÇÊ÷ÆÊ ÒÔ1½ÚµãΪ¸ù½¨Ê÷ µ±$v$ÔÚ$u$Íâʱ,ÏÔȻֱ½Ó¸ã ·ñÔò¾Í°Ñ$v$Ìøµ½ËüµÄ$dep[v] dep[u] 1$¼¶¸¸Ç×,¿´ÊÇ$u$µÄ ÔĶÁÈ«ÎÄ
posted @ 2019-03-08 19:52 cloud_9 ÔĶÁ(210) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ¸øÄãÒ»¿Ãn¸öµãµÄÊ÷£¬±àºÅ1~n¡£a56爆大奖在线娱乐µã¿ÉÒÔÊǺÚÉ«£¬¿ÉÒÔÊÇ°×É«¡£³õʼʱËùÓе㶼ÊǺÚÉ«¡£ÏÂÃæÓÐÁ½ÖÖ²Ù×÷ÇëÄã²Ù×÷¸øa56爆大奖在线娱乐ÃÇ¿´£º 0 u£ºÑ¯ÎÊÓжàÉÙ¸ö½ÚµãvÂú×ã·¾¶uµ½vÉÏËùÓнڵ㣨°üÀ¨£©¶¼ÓµÓÐÏàͬµÄÑÕÉ« 1 u£º·­×ªuµÄÑÕÉ« Hint: $n\le 10^5$ Solution: Õâ ÔĶÁÈ«ÎÄ
posted @ 2019-03-06 20:44 cloud_9 ÔĶÁ(175) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ¸ø¶¨Ò»¸öÐòÁÐ$a_1,a_2,a_3...a_n$ ÇóÓжàÉÙ¸ö²»ÉÏÉý×ÓÐòÁÐ: $a_{b1},a_{b_2}...$ Âú×ã $C_{a_{b1}}^{a_{b2}} C_{a_{b2}}^{a_{b3}} .....mod\ 2 0$ Êä³ö¶Ô$10^9+7$È¡Ä£µÄ½á¹û Hi ÔĶÁÈ«ÎÄ
posted @ 2019-03-04 22:32 cloud_9 ÔĶÁ(133) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
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