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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
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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