ÕªÒª£º Description: Ò»¸öʳÎïÍøÓÐN¸öµã£¬´ú±íNÖÖÉúÎÈç¹ûÉúÎïx¿ÉÒÔ³ÔÉúÎïy£¬ÄÇô´ÓyÏòxÁ¬Ò»¸öÓÐÏò±ß¡£ Õâ¸öͼûÓл·¡£ ͼÖÐÓÐһЩµãûÓÐÁ¬³ö±ß£¬ÕâЩµã´ú±íµÄÉúÎﶼÊÇÉú²úÕߣ¬¿ÉÒÔͨ¹ý¹âºÏ×÷ÓÃÀ´Éú´æ£» ¶øÓÐÁ¬³ö±ßµÄµã´ú±íµÄ¶¼ÊÇÏû·ÑÕߣ¬ËüÃDZØÐëͨ¹ý³ÔÆäËûÉúÎïÀ´Éú´æ¡£ Èç¹ûij¸öÏû·ÑÕßµÄËùÓÐʳÎﶼÃð¾ø ÔĶÁÈ«ÎÄ
posted @ 2019-03-10 19:08 cloud_9 ÔĶÁ(160) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: L = | P2 ¨C P1 | + | P3 ¨C P2 | + ¡­ + | PN ¨C PN 1 | ¸øÄãÒ»¸öNºÍM£¬ÎÊ£ºËæ»úÒ»¸ö1¡­NµÄÅÅÁУ¬ËüµÄ²¨¶¯Ç¿¶È(L)²»Ð¡ÓÚMµÄ¸ÅÂÊÓжà´ó£¿ Hint: $n \le 100$ Solution: ´«ËµÖеÄÉñÏÉdp,ÄÑÔÚÈçºÎת»¯ÎÊÌâ ÔĶÁÈ«ÎÄ
posted @ 2019-03-10 15:33 cloud_9 ÔĶÁ(219) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
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posted @ 2019-03-10 11:45 cloud_9 ÔĶÁ(220) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
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posted @ 2019-03-10 11:38 cloud_9 ÔĶÁ(102) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ÓÐÁ½¸ö»ùÒò´®SºÍT£¬ËûÃÇÖ»°üº¬AGCTËÄÖÖ×Ö·û¡£ÏÖÔÚÄãÒªÕÒ³öTÔÚSÖгöÏÖÁ˼¸´Î¡£ ÓÐÒ»¸öÃÅÏÞÖµk¡Ý0¡£TÔÚSµÄµÚi(1¡Üi¡Ü|S| |T|+1)¸öλÖÃÖгöÏÖµÄÌõ¼þÈçÏ£º°ÑTµÄ¿ªÍ·ºÍSµÄµÚi¸ö×Ö·û¶ÔÆ룬ȻºóTÖеÄÿһ¸ö×Ö·ûÄܹ»ÔÚSÖÐÕÒµ½Ò»ÑùµÄ£¬ÇÒλÖÃÆ«²î²»³¬¹ýkµÄ£¬ÄÇô¾ÍÈÏΪ ÔĶÁÈ«ÎÄ
posted @ 2019-03-10 11:36 cloud_9 ÔĶÁ(162) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º Description: ¼ÓÀï¶Ø´óѧµÄÉúÎïÑо¿Ëù£¬·¢ÏÖÁ˾ö¶¨ÈËϲ²»Ï²»¶³ÔźµÄ»ùÒòÐòÁÐS,ÓÐÕâ¸öÐòÁеļî»ùÐòÁоͻá±íÏÖ³öϲ»¶³ÔźµÄÐÔ×´£¬µ«ÊÇÑо¿ÈËÔ±·¢ÏÖ¶Ô¼î»ùÐòÁÐS,Èa56爆大奖在线娱乐âÐÞ¸ÄÆäÖв»³¬¹ý3¸ö¼î»ù£¬ÒÀÈ»Äܹ»±íÏÖ³ö³ÔźµÄÐÔ×´¡£ÏÖÔÚÑо¿ÈËÔ±ÏëÖªµÀÕâ¸ö»ùÒòÔÚDNAÁ´S0ÉϵÄλÖá£a56爆大奖在线娱乐ÄãÐèҪͳ¼ÆÔÚÒ»¸ö±íÏÖ³ö³ÔźÐÔ ÔĶÁÈ«ÎÄ
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