ã¢ã«ãŽãªãºã ãšã¯
Algorithms.
- åé¡ãè§£ãããã®èšç®ææ®µ.
- è§£ãå®ãŸã£ãŠãããèšç®å¯èœãåé¡ã«å¯ŸããŠããã®è§£ãæ£ããæ±ããæç¶ã(Wikipedia).
ðããŒã¿æ§é ã¯ãã£ã¡.
ðãœãŒãã¢ã«ãŽãªãºã
äžŠã¹æ¿ã.
ðMerge Sort
ðQuick Sort
ã¢ã³ãããŒã»ããŒã¢.
ðæé ãšéé (ascending/descending)
- æé (ããããã ã): å°ããæ¹ãã倧ããªæ¹ãž. ascending order, asc.
- éé (ãããã ã): 倧ããæ¹ããå°ããæ¹ãž. descending order, dsec.
ðæ¢çŽ¢ã¢ã«ãŽãªãºã
ðç·åœ¢æ¢çŽ¢
linear search. æãåºæ¬.
ðäºåæ¢çŽ¢
binary search.
ðé»éå岿¢çŽ¢
Golden-section search.
- æ¢çŽ¢ç¯å²å ã§æ¥µå€ïŒæå€§ãŸãã¯æå°ïŒã1ã€ãããªãåå³°æ§é¢æ°ã«å¯ŸããŠå¹ççã«æ¥µå€ãæ±ãã
- æ€çŽ¢ç¯å²ãçŽ 0.618å ã«çž®å°ãã察æ°ãªãŒããŒã§åæ
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ãªã«ãããChatGPTããããªãæããŠãããâŠ
ðå¹ åªå æ¢çŽ¢
ðæ·±ãåªå æ¢çŽ¢
ãªã¹ãèšç®ç³»ã¢ã«ãŽãªãºã
ð环ç©å(cumsum)
ðã¹ã©ã€ãã£ã³ã°ãŠã£ã³ããŠã¢ã«ãŽãªãºã
Sliding Window Algorithm. ðãªã¹ãæ§é ããã©ããŒã¹ããã¢ã«ãŽãªãºã .
ãªã¹ãå ã®ç¹å®ç¯å²ã«é¢æ°ãé©çšããŠ, ããã«ãã®é¢æ°é©çšãããããªãããªã¹ãã«é©çšããŠããããšãç¹°ãè¿ããŠããã¢ã«ãŽãªãºã .
Pandasã ãšrolling windowãšåŒã°ããŠãã. çªé¢æ°ãšã.
æç³»åããŒã¿ã®æ±ãã®ã³ã³ãã¯ã¹ãã§çµ±èšéãäœæãããšãã«çŸããããšãããã.
- ãã¢ã«ãŽãªãºã ãã¹ã©ã€ãã£ã³ã°ãŠã£ã³ããŠã¢ã«ãŽãªãºã
- ð¡Clojureã§Sliding window Algorithm
ðèšç®é/ãªãŒã
ã¢ã«ãŽãªãºã ã®æŒç®æ§èœãè¡šãææš.
- Oã§è¡šèšããããã€(Oèšæ³)
2ã€ã®maps of listãidã§ããŒãžããã«ã¯Mapã«å€æããŠçªãåããã
ïŒã€ã®jsonããŒã¿ãidãããŒã«ããŠmargeãããšãã¯, èŸæžã«å€æããŠãããå§åçã«å¹çç.
- èŸæžã䜿çšããå Žå: O(n + m)
- çŽæ¥æ€çŽ¢ããå Žå: O(m * n)
ãªã¹ãã®å é ãã鿬¡æ€çŽ¢ãããã®ã¯ããŒã¿ã倧ãããªãã°ãªãã»ã©éå¹çãªã®ã§ååŠçãããããšããã .
ç«¶æããã°ã©ãã³ã°
ãããã¯AtCoderã®åã®TopCoderäžä»£ã®äººã ã£ãããª? ãŸããããã.
TopCoder
AtCoder
Zettels
æºãŸã£ããŠããç§»å.
ðReferences
coursera Algorithms
ã¢ã«ãŽãªãºã ã«å¯Ÿãããããã®åç¹.
- coursera Algorithms Partâ ãåè¬ããŸãã | Futurismo
- coursera Algorithms PartIIãåè¬ããŸãã | Futurismo
- Source: Java Algorithms and Clients
- eBook: Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne