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s↑.link=p↑.link; p↑.link:=s q↑.link;=s; s↑.link:=p p↑:link:=s↑.link; s↑.link=p p↑.link=s; s↑.link:=q
s→qink=p→link; p→link=s p→link=s; s→qink=q p→link=s→link; s→link=p q→link=s; s→link=p
p↑.next:=p↑.next↑.next; p:=p↑.next;p↑.next:=p↑.next↑.next; free(p↑.next); p:=p↑.next↑.next;
q↑.link:=p↑.link;p↑.link:=q; q:=p↑.link;p↑.link:=q↑.link; q↑.link:=p;p↑.link:=q; q:=p↑.link;p:=q↑.link;
p↑.rlink↑.llink: =q; p↑.rlink: =q; q↑.llink: =p; q↑.rlink: =p↑.rlink; p↑.llink↑.rlink: =q; p↑.llink: =q; q↑.rlink: =p; q↑.llink: =p↑.llink; q↑.llink: =p; q↑.rlink: =p↑.rlink; p↑.rlink↑.llink: =q; p↑.rlink: =q↑; q↑.rlink: =p; q↑.llink: =p↑.llink; p↑.llink↑.rlink: =q; p↑.llink: =q;
s↑.link:=p↑.link;p↑.link:=s q↑.link:=s;s↑.link:=p p↑.link:=s↑.link;s↑.link:=p p↑.link:=s;s↑.link:=q
s↑.link:=p↑.link;p↑.link:=s q↑.link:=s;s↑.link:=p p↑.link:=s↑.link;s↑.link:=p p↑.link:=s;s↑.link:=q
p↑. next: =p↑. next↑. Next; p:=p↑. next; p↑. next:=p↑. next↑. next; free(p↑. next); p:=p↑. next↑. next;
p↑.next:=p↑.next↑.next; P:=p↑.next; p↑.next:=p↑.next↑.next; free(p↑.nex; p:=p↑.next↑.next;
s↑.link:=p↑.link;p↑.link:=s q↑.link:=s;s↑.link:=p p↑.link:=s↑.link;s↑.link:=p p↑.link:=s;s↑.link:=q
p↑.rlink↑.llink:=q;p↑.rlink:=q;q↑.llink:=p;q↑.rlink:=p↑,rlink; p↑.llink↑.rlink:=q;p↑.llink:=q;q↑.rlink:=p;q↑.llink:=p↑.llink; q↑.llink:=p;q↑.rlink:=p↑.rlink;p↑.rlink↑.llink:=q;p↑.rlink:=q↑; q↑.rlink:=p;q↑.llink:=p↑.llink;p↑.1link↑.rlink:=q;p↑.llink:=q;
p↑.next:=p↑.next↑.next; p:=p↑.next; p↑.next:=p↑.next↑.next; free(p↑.nex; p:=p↑.next↑.next;
p↑.next:=p↑.next↑.next; p:=p↑.next;p↑.next:=p↑.next↑.next; flee(p↑.next); p:=p↑.next↑.next;
q↑.link:=p↑.link;p↑link:=q; q:=p↑.link;p↑.link:=q↑.link; q↑.link:=P;p↑.link:=q; q:=P↑.link;p:=q↑.link;
q↑.link: =p↑.link; p↑.link: =q; q: =p↑.link; p↑.link:=q↑.link; q↑.link: =p; p↑.link: =q; q:=p↑.link; p:=q↑.link;
p↑.next:=p↑.next↑.next; p:=p↑.next; p↑.next:=p↑.next↑.next; free(p↑.next); p:=p↑.next↑.next;
p↑. next: =p↑. next↑. Next; p:=p↑. next; p↑. next:=p↑. next↑. next; free(p↑. nex; p:=p↑. next↑. next;
p↑.next:=p↑.next↑.next; p:=p↑.next;p↑.next:=p↑.next↑.next; flee(p↑.nex; p:=p↑.next↑.next;