100 年台大電機丙資結 === > 有錯歡迎留言指正 1. E,[參考](https://www.geeksforgeeks.org/write-a-c-program-to-print-all-permutations-of-a-given-string/) 2. A 3. B 4. B 5. D 6. E,畫出 Trie 即可知 7. CD,不選 E 是因為當 k = n 時不成立 8. BCD Merge Sort 用不同資料結構實作的時間如下 : | Array | [Singly Linked List](https://www.geeksforgeeks.org/merge-sort-for-linked-list/) | [Doubly Linked List](https://www.geeksforgeeks.org/merge-sort-for-doubly-linked-list/) | |:----------:|:------------------:|:------------------:| | $O(nlogn)$ | $O(nlogn)$ | $O(nlogn)$ | 9. BE 10. CDE 11. AB(C\)D,C 有爭議,若用圖論來看,樹為無向圖,可選;若用資節來看,樹為有向圖,不可選 12. AE 13. E 14. ABCD 15. ABE 16. B
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