Singly-linked List Segments Properties lseg a(i,j)分i一a,j Iseg aB(i,k)j.Iseg a (i,j)*Iseg B(j,k) lseg a-b(i,k)÷j.Iseg a(i,j)*j→b,k list a i台Iseg a(i,nil)Singly-linked List Segments