¾¿ÀÁÂ?ÃÄÅÆÇ?0(n+m).\r44 . ÈÉ=ÊAËÌ¡ÍÎd \rÏÐ class A public class B, public classC {}\rÑ Ò A AËÌgiÓ?ÔÒ?AÕ\rf ? compiler-dependentA?ÖA×ØÙ\rÚÖ\rÐÛÖÜÝÞrsßÞ=ÊAà?áâã-;äA\rà?áÅÆ\r ª Ü åæ[çèC++éêëìí\r45 . Ðîïðefãbc?ñAÕ(«¬ÖÚ?BC\rD?ÁÈòÚ?fóôõö)\rstruct node { char val# node* next#}\rbool check (const node* head) {} //return false \r÷ñ-trueñeø0(n)Aù??(úfõö?efû\rüeý?efûüý?ÐÛñAàþÉ\r?ÿ )@\rbool check (const node* head)\r(\rif(headNULL) returnfalse#\rnode *low=head, *fast=head->next#\rwhile (fast!=NULL && fast->next!=NULL)\rlow=low->next#.\rfast=fast->next->nextp\rif(low==fast) returntruep\r}\rreturnfalsep
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