Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Quick Sort

Avatar for KuoE0 KuoE0
March 15, 2013
Programming
5
10k

Quick Sort

Avatar for KuoE0

KuoE0

March 15, 2013
Tweet

More Decks by KuoE0

See All by KuoE0
Protocol handler in Gecko
Avatar for KuoE0 kuoe0
0
100
面試面試面試，因為很重要所以要說三次！
Avatar for KuoE0 kuoe0
2
270
應徵軟體工程師
Avatar for KuoE0 kuoe0
0
180
面試心得分享
Avatar for KuoE0 kuoe0
0
430
Windows 真的不好用...
Avatar for KuoE0 kuoe0
0
310
Python @Wheel Lab
Avatar for KuoE0 kuoe0
0
230
Introduction to VP8
Avatar for KuoE0 kuoe0
0
270
Python @NCKU_CSIE
Avatar for KuoE0 kuoe0
0
130
[ACM-ICPC] Tree Isomorphism
Avatar for KuoE0 kuoe0
1
260

Other Decks in Programming

See All in Programming
メルカリのリーダビリティチームが取り組む、AI時代のスケーラブルな品質文化
Avatar for osari.k cloverrose
2
510
dchart: charts from deck markup
Avatar for Anthony Starks ajstarks
3
990
生成AIを使ったコードレビューで定性的に品質カバー
Avatar for Chiaki Okamoto chiilog
1
250
CSC307 Lecture 02
Avatar for Javier Gonzalez-Sanchez javiergs
PRO
1
770
組織で育むオブザーバビリティ
Avatar for ryotaro kobayashi ryota_hnk
0
170
CSC307 Lecture 08
Avatar for Javier Gonzalez-Sanchez javiergs
PRO
0
670
高速開発のためのコード整理術
Avatar for sutetotanuki sutetotanuki
1
390
CSC307 Lecture 04
Avatar for Javier Gonzalez-Sanchez javiergs
PRO
0
660
0→1 フロントエンド開発 Tips🚀 #レバテックMeetup
Avatar for 弁護士ドットコム bengo4com
0
540
AI巻き込み型コードレビューのススメ
Avatar for Nealle nealle
0
130
なぜSQLはAIぽく見えるのか/why does SQL look AI like
Avatar for florets1 florets1
0
450
Kotlin Multiplatform Meetup - Compose Multiplatform 외부 의존성 아키텍처 설계부터 운영까지
Avatar for Suhyeon Kim wisemuji
0
190

Featured

See All Featured
YesSQL, Process and Tooling at Scale
Avatar for Rocio Delgado rocio
174
15k
How to Align SEO within the Product Triangle To Get 
Buy-In & Support - #RIMC
Avatar for Aleyda Solis aleyda
1
1.4k
How People are Using Generative and Agentic AI to Supercharge Their Products, Projects, Services and Value Streams Today
Avatar for Helen Beal helenjbeal
1
120
Statistics for Hackers
Avatar for Jake VanderPlas jakevdp
799
230k
From Legacy to Launchpad: Building Startup-Ready Communities
Avatar for Dug Song dugsong
0
140
Lightning talk: Run Django tests with GitHub Actions
Avatar for Sarah Abderemane sabderemane
0
110
The Pragmatic Product Professional
Avatar for Laura Van Doore lauravandoore
37
7.1k
The Success of Rails: Ensuring Growth for the Next 100 Years
Avatar for Eileen M. Uchitelle eileencodes
47
7.9k
The #1 spot is gone: here's how to win anyway
Avatar for Tamara Novitovic tamaranovitovic
2
930
The Cult of Friendly URLs
Avatar for Andy Hume andyhume
79
6.8k
Google's AI Overviews - The New Search
Avatar for Barry Adams badams
0
900
Rails Girls Zürich Keynote
Avatar for Gregor Martynus gr2m
96
14k

Transcript

  1. Quick Sort ֲࢸݢʢKuoE0ʣ [email protected] KuoE0.ch

  2. Latest update: Mar 15, 2013 Attribution-ShareAlike 3.0 Unported (CC BY-SA

    3.0) http://creativecommons.org/licenses/by-sa/3.0/

  3. Algorithm ࠾༻ divide & conquer ࡦུ

  4. Divide ኺᏐྻத௅ग़Ұݸݩૉ࡞ҝ pivotɼར ༻ pivot ሡݪᏐྻ෼ҝၷݸࢠᏐྻɿ • ॴ༗ݩૉখԙ pivot తᏐྻ

    A • ॴ༗ݩૉେԙ pivot తݩૉతᏐྻ B • ౳ԙ pivot తݩૉՄ์ஔࡏ೚Ұݸத

  5. 2 9 4 3 8 7 5 1 6

  6. 2 9 4 3 8 7 5 1 6 2

    7 4 3 5 1 6 9 8

  7. 9 8 2 4 3 5 1 6 2 9

    4 3 8 7 5 1 6 2 7 4 3 5 1 6 9 8

  8. 9 8 2 4 3 5 1 6 2 4

    5 1 6 2 9 4 3 8 7 5 1 6 2 7 4 3 5 1 6 9 8 3

  9. 4 5 6 2 1 9 8 2 4 3

    5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 2 7 4 3 5 1 6 9 8 3

  10. 4 5 6 2 1 2 9 8 2 4

    3 5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 2 7 4 3 5 1 6 9 8 3 1

  11. 4 5 6 2 1 2 9 8 2 4

    3 5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 2 2 7 4 3 5 1 6 9 8 3 1

  12. 4 5 6 5 6 2 1 2 9 8

    2 4 3 5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 2 2 7 4 3 5 1 6 9 8 3 1 4

  13. 5 6 4 5 6 5 6 2 1 2

    9 8 2 4 3 5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 2 2 7 4 3 5 1 6 9 8 3 1 4

  14. 5 6 5 4 5 6 5 6 2 1

    2 9 8 2 4 3 5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 2 2 7 4 3 5 1 6 9 8 3 1 4 6

  15. 5 6 5 4 5 6 5 6 2 1

    2 9 8 2 4 3 5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 2 5 2 7 4 3 5 1 6 9 8 3 1 4 6

  16. 5 6 5 4 5 6 5 6 2 1

    2 9 8 9 2 4 3 5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 2 5 2 7 4 3 5 1 6 9 8 3 1 4 6 8

  17. 5 6 5 4 5 6 5 6 2 1

    2 9 8 9 2 4 3 5 1 6 2 4 5 1 6 2 9 4 3 8 7 5 1 6 9 2 5 2 7 4 3 5 1 6 9 8 3 1 4 6 8

  18. Conquer ༝ԙࢠᏐྻቮඃ pivot ෼ҝၷஈɼҰஈ খԙ౳ԙ pivot తᏐྻ Aɼ㠥Ұஈେԙ ౳ԙ pivot

    తᏐྻ Bɻ

  19. Conquer ༝ԙࢠᏐྻቮඃ pivot ෼ҝၷஈɼҰஈ খԙ౳ԙ pivot తᏐྻ Aɼ㠥Ұஈେԙ ౳ԙ pivot

    తᏐྻ Bɻ A B C

  20. 2 2

  21. 2 2 1

  22. 2 2 1

  23. 1 2 1 2 2 5 2 5 1 6

  24. 1 2 1 2 2 5 2 5 1 6

  25. 5 6 1 2 1 2 5 6 2 5

    2 5 1 6 4

  26. 5 6 1 2 1 2 5 6 2 5

    2 5 1 6 4

  27. 4 5 6 5 6 1 2 1 2 4

    5 6 5 6 2 5 2 5 1 6 4 3

  28. 4 5 6 5 6 1 2 1 2 4

    5 6 5 6 2 5 2 5 1 6 4 3

  29. 1 2 3 4 5 6 4 5 6 5

    6 1 2 1 2 4 5 6 5 6 1 2 3 4 5 6 9 2 5 2 5 9 1 6 4 3 8

  30. 1 2 3 4 5 6 4 5 6 5

    6 1 2 1 2 4 5 6 5 6 1 2 3 4 5 6 9 2 5 2 5 9 1 6 4 3 8

  31. 8 9 1 2 3 4 5 6 8 9

    4 5 6 5 6 1 2 1 2 4 5 6 5 6 1 2 3 4 5 6 9 2 5 2 5 9 7 1 6 4 3 8

  32. 8 9 1 2 3 4 5 6 8 9

    4 5 6 5 6 1 2 1 2 4 5 6 5 6 1 2 3 4 5 6 9 2 5 2 5 9 7 1 6 4 3 8

  33. 8 9 1 2 3 4 5 6 8 9

    4 5 6 5 6 1 2 1 2 4 5 6 5 6 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 9 2 5 2 5 9 7 1 6 4 3 8

  34. 9 3 How to Divide 4 1 5 8 6

    7 2

  35. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  36. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  37. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  38. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  39. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  40. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  41. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  42. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  43. 9 3 How to Divide 4 1 5 8 6

    4 7 2

  44. 9 3 How to Divide 4 1 5 8 6

    4 7 2 4 1 3 2 5 8 7 9 6

  45. 5 6 7 8 9 3 2 1 4 How

    to Conquer

  46. 5 6 7 8 9 3 2 1 4 How

    to Conquer

  47. 5 6 7 8 9 3 2 1 4 How

    to Conquer

  48. 5 6 7 8 9 3 2 1 4 How

    to Conquer

  49. void quickSort( int L, int R ) { if (

    R - L <= 1 ) return; int pivot = N[ R - 1 ], p = L; for ( int i = L; i < R - 1; ++i ) { if ( N[ i ] <= pivot ) { swap( N[ i ], N[ p ] ); ++p; } } swap( N[ R - 1 ], N[ p ] ); quickSort( L, p ); quickSort( p + 1, R ); } In-place Version

  50. 9 4 3 6 5 1 8 7 How to

    Divide 2

  51. 9 4 3 6 5 1 8 7 How to

    Divide 2 6

  52. 9 4 3 6 5 1 8 7 How to

    Divide 2 2 6

  53. 9 4 3 6 5 1 8 7 How to

    Divide 2 2 6

  54. 9 4 3 6 5 1 8 7 How to

    Divide 2 2 2 6

  55. 9 9 4 3 6 5 1 8 7 How

    to Divide 2 2 2 6

  56. 9 9 4 4 3 6 5 1 8 7

    How to Divide 2 2 2 9 6

  57. 9 9 4 4 3 6 5 1 8 7

    How to Divide 2 2 2 9 6

  58. 9 9 4 4 3 6 5 1 8 7

    How to Divide 2 2 2 9 4 6

  59. 9 9 4 4 3 3 6 5 1 8

    7 How to Divide 2 2 2 9 4 6

  60. 9 9 4 4 3 3 6 5 1 8

    7 How to Divide 2 2 2 9 4 6

  61. 9 9 4 4 3 3 6 5 1 8

    7 How to Divide 2 2 2 9 4 3 6

  62. 9 9 4 4 3 3 6 5 1 8

    7 8 How to Divide 2 2 2 9 4 3 6

  63. 9 9 4 4 3 3 6 5 1 8

    7 8 8 How to Divide 2 2 2 9 4 3 6

  64. 9 9 4 4 3 3 6 5 1 8

    7 8 7 8 How to Divide 2 2 2 9 4 3 6

  65. 9 9 4 4 3 3 6 5 1 8

    7 8 7 8 7 How to Divide 2 2 2 9 4 3 6

  66. 9 9 4 4 3 3 6 5 1 5

    8 7 8 7 8 7 How to Divide 2 2 2 9 4 3 6

  67. 9 9 4 4 3 3 6 5 1 5

    8 7 8 7 8 7 How to Divide 2 2 2 9 4 3 6

  68. 9 9 4 4 3 3 6 5 1 5

    8 7 8 7 8 7 How to Divide 2 2 2 5 9 4 3 6

  69. 9 9 4 4 3 3 6 5 1 5

    8 7 8 7 8 7 How to Divide 2 2 2 5 9 4 3 1 6

  70. 9 9 4 4 3 3 6 5 1 5

    8 7 8 7 8 7 How to Divide 2 2 2 5 9 4 3 1 6

  71. 9 9 4 4 3 3 6 5 1 5

    8 7 8 7 8 7 How to Divide 2 2 2 5 9 4 3 1 1 6

  72. 9 9 4 4 3 3 6 5 1 5

    8 7 8 7 8 7 How to Divide 2 2 2 5 9 4 3 1 1 6

  73. 9 9 4 4 3 3 6 5 1 5

    8 7 8 7 8 7 How to Divide 2 2 2 5 9 4 3 1 1 6 2 5 4 3 1 8 9 7

  74. 6 How to Conquer 1 4 2 3 5 8

    7 9 1 4 2 3 5 8 7 9

  75. 6 How to Conquer 1 4 2 3 5 8

    7 9 1 4 2 3 5 8 7 9

  76. End