13. 假設某二元樹的中序追蹤(in-order traversal)字串為AIBHCGDFE,後序追蹤(post-order
traversal)字串為ABICHDGEF,請問此二元樹的前序追蹤(pre-order traversal)所得字串為何?
(A) EFDGCHBIA
(B) FGIHBACDE
(C) FGHIABCDE
(D) FGHAIBDCE
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統計: A(77), B(140), C(999), D(72), E(0) #1476250
統計: A(77), B(140), C(999), D(72), E(0) #1476250
