???? - ?? C ?? 2

1
Chapter 13 ??

• 13.1 ????
• 13.2 ????
• 13.3 ????
• 13.4 ????
• 13.5 ????

• 13.6 ????
• 13.7 ?????
• 13.8 ????
• 13.9 ????

2
Chapter 13 ??

• ???????????
• ????(internal sort)
• ??????????(main memory)?????,????
• ????(external sort)
• ??????,????????????,????????,???????????,????

3
Chapter 13 ??

• ?????????????????,?????????
• ????(comparative sort)
• ?????????????(key value)??,????
• ????(distributive sort)
• ???????????????,?????

4
Chapter 13 ??

• ????(file)????(record),???????????????? k(i)
  k(j)??? r(i) ? r(j),????????,r(i) ?? r(j)
  ???????,???? r(i) ?? r(j) ??,??????????(stable)??
  ?,?? r(j) ? r(i) ??,?????????(unstable)???????????
  ????????,???????,??,???????????,?????????

5
13.1 ????

• ????(bubble sort)???????(interchange sort)?
• ??????,???????????,??????
• ???n???????n-1???,??????,?????1,??????,?????????

6
13.1 ????

• ???5???,???18, 2, 20, 34, 12??????????

7
13.1 ????

• ?????12, 18, 2, 20, 34,?????????

8
13.1 ????

• ????????,????????,??????????,?????????????????????
  ?????????????
• ?????stable,??????????O(n2),???????????

9
13.2 ????

• ????(selection sort)????????????????????????(?????
  ???),??????????????????????.....,?????

10
13.2 ????

• ???5???,????18, 2, 20, 34, 12???????,?????
• ????????????stable,???????????O(n2),???????????

11
13.3 ????

• ????(insertion sort)??????????????,?????

12
13.3 ????

• ?j???????????,?????????j4?,??25,???39?45???,??25?
  ?12?????????
• ?????stable???,???????????O(n2),?????????

13
13.4 ????

• ????(merge sort)?????????????????,???????????????

14
13.4 ????

• ???????????,?????????????,???????,?????,?????,????
  ?8???18, 2, 20,34, 12, 32, 6, 16?

15
13.4 ????

• ????????????????,??????????????????????
• ?????stable,???????????O(nlog2n) ?????????????????

16
13.5 ????

• ????(quick sort)?????????(partition exchange
  sorting)????????,?????????????????n?R1, R2, R3,
  ..., Rn,????K1, K2, K3, ..., Kn?

17
13.5 ????

• ??????????
• ?????????k1???K?
• ???? i 2,3,...,n,????ki gt K?
• ???? j n, n-1, n-2, ..., 2,????kj lt K ?
• ?iltj ?Ri?Rj??,??R1?Rj???

18
13.5 ????

• ???????,??????39, 11, 48, 5, 77, 18, 70, 25, 55,
  33,??????????

19
13.5 ????

• ???39?????????39?,??????39??
• ?????????????????,????(recursive)?
• ?????unstable,?????O(n2),?????O(n log2n) ?

20
13.5 ????

• ??????????

21
13.6 ????

• ??(heap)??????,????????????????????????????
• ???heap????????????(heap sort)?
• ?13-1?(a)??heap???,?(b)???

22
13.6 ????

• ????13-2??heap?????

23
13.6 ????

• ???13-2????????
• ? ??,A10 25 lt A5 67?????
• A4 5,??????A8 58,?58 gt 5,??A4?A8???

24
13.6 ????

• A3 80??????A7 62??,?80 gt 62,??????
• A2 7,?????A5 67,?A2?A5??,??A5??A
  10?????

25
13.6 ????

• A1 27,??A3 80,?A1?A3??,??A3??A7???
  ??,??????

26
13.6 ????

• ????????heap?,?1???80??,??80??10?7??,????,????????
  ????,???????????1??
• ????????????heap??,????????????????

27
13.6 ????

• ?????????????????,?????1????,????????,????????????
  ???,??????????,?????,??????,????????????,?????(??
  ???????????heap????)?

28
13.6 ????

• ??a1 80, A2 67, a3 62, A4 58,
  A5 25, A6 18, A7 27, A8 5, A9
  24, a10 7,?i 1?,????A1?A10??,????A10i
  2,?????A9??,????A9,???????i
  1?,??80,??????

29
13.6 ????
30
13.6 ????

• ?????????67?62,???67????7??,?????????????(??67???
  ????),?????????(???????)?????

31
13.6 ????

• i 2,?i 1

32
13.6 ????

• i 3?i 2

33
13.6 ????

• i 4?i 3

34
13.6 ????

• i 5?i 4

35
13.6 ????

• i 6?i 5

36
13.6 ????

• i 7?i 6

37
13.6 ????

• i 8?i 7

38
13.6 ????

• i 9?i 8
• ?????5,??????
• ?????????,?????80, 67, 62, 58, 27, 25, 24, 18, 7,
  5

39
13.7 ?????

• ?????(binary tree sort)?????????????????,?????????
  ,????
• ???????????
• ????????????,?????,????????,??????
• ?????????,???????,??????????????

40
13.7 ?????
41
13.7 ?????
42
13.7 ?????

• ??????????????(????)???

43
13.8 ????

• ???9???,???18, 2, 20, 34, 12, 32, 6, 16, 25,
  10?????(shell sort)????
• ?????????Y (9/2)??,?Y 4,Y????,??1, 5, 9
  ?????2, 6??????3, 7?????4, 8??????
• ?????????Y,??????????2,?Yi1 Yi/2,???????????1?

44
13.8 ????

• ???????????,?15,26,37,48 ?
• ????????,???????????????,?????????,????????????,??
  ????,??????

45
13.8 ????
46
13.9 ????

• ????(radix sort)???bucket sort?bin sort?
• ????distribution sort??????????????????????,??????
  ????????
• ?????stable,????????O(n logr m) ?

47
13.9 ????

• ????LSD?????,?????????10,?1 ????????????,???????,?
  ??????

48
13.9 ????
49
13.9 ????

• ?????????,?F(i)??,0 lt i lt r,????????,????
• ?????,???????????????????,???????????

50
13.9 ????
51
13.9 ????

• ????????????
• ????????????????????,????????????

52
13.9 ????
53
13.9 ????

• ???????????
• ?????????