C++11 乱数 std::random 入門
rand() ã®å•é¡Œç‚¹ ã“ã‚Œã¾ã§åºƒã使用ã•ã‚Œã¦ã㟠rand() ã«ã‚ˆã‚‹ä¹±æ•°ç”Ÿæˆã«ã¯ä»¥ä¸‹ã®å•é¡Œç‚¹ãŒã‚る。 生æˆã•ã‚Œã‚‹ç¯„囲㌠[0, 32767] ã¨ç‹ã„ rand() % N ã¯ä¸€æ§˜ã§ã¯ç„¡ã„ 周期ãŒã‚ã¾ã‚Šé•·ããªã„ 乱数生æˆã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ãŒå›ºå®šï¼ˆé€šå¸¸ã¯ç·šå½¢åˆåŒæ³•ï¼‰ æ£è¦åˆ†å¸ƒãªã©ã€ä¸€æ§˜ã§ãªã„乱数生æˆãŒé¢å€’ rand() ã§ç”Ÿæˆã•ã‚Œã‚‹å€¤ã®ç¯„囲㯠[0, 32767] ã¨ç‹ã„。15ビットã—ã‹ãªã„。 (rand() << 15) + rand() ã¨ã™ã‚Œã°ã€30ビット乱数ã«ã™ã‚‹ã“ã¨ã¯å¯èƒ½ã ãŒã€ã‚¹ãƒžãƒ¼ãƒˆã§ã¯ãªã„ã—〠生æˆã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã®é–¢ä¿‚ã§ã€ä¹±æ•°ã«åã‚ŠãŒå‡ºã‚‹å ´åˆãŒã‚る。 通常ã€ä¹±æ•°ã¨ã—ã¦æ¬²ã—ã„ã®ã¯ [0, N) 範囲ã®å€¤ã§ã‚ã‚‹ã“ã¨ãŒå¤šã„。ã“ã®å ´åˆã¯ rand() % N ã¨ã™ã‚‹ã“ã¨ãŒä¸€èˆ¬çš„ã 。 ã—ã‹ã—ã€ã“ã®ã‚ˆã†ã«ã—ã¦ç”Ÿæˆã—ãŸä¹±æ•°ã¯ä¸€æ§˜ã§ãªãåã‚ŠãŒã‚る。特㫠N ãŒå¤§ãã„時ã«ãã®ç¾è±¡ãŒé¡•è‘—ã«ãªã‚‹ã€‚ 例ãˆã°
Racanhack コード解説
図目次1-1. ã™ã¹ã¦ã®éƒ¨å±‹ãŒé€šè·¯ã§ã¤ãªãŒã£ã¦ã„ãªã„例1-2. ã¾ãšã¯å…¨ä½“ãŒrect[0]ã§ã™ã€‚1-3. rect[0]ã‚’ã€åˆ†å‰²ã—ã¾ã™ã€‚rect[0]ã¨rect[1]ãŒã§ãã¾ã—ãŸã€‚1-4. rect[0]ã‚’ã€åˆ†å‰²ã—ã¾ã™ã€‚rect[0]ã¨rect[2]ãŒã§ãã¾ã—ãŸã€‚1-5. rect[2]ã‚’ã€åˆ†å‰²ã—ã¾ã™ã€‚rect[2]ã¨rect[3]ãŒã§ãã¾ã—ãŸã€‚1-6. å„区画ã«ã²ã¨ã¤ãšã¤éƒ¨å±‹ã‚’作りã¾ã™ã€‚1-7. å„分割線ã”ã¨ã«éƒ¨å±‹ã‚’通路ã§ã¤ãªãŽã¾ã™ã€‚1-8. ã¾ãšã¯å…¨ä½“ãŒrect[0]ã§ã™ã€‚1-9. rect[0]ã‚’ã€æ¨ªã«åˆ†å‰²ã—ã¾ã™ã€‚rect[0]ã¨rect[1]ãŒã§ãã¾ã—ãŸã€‚1-10. rect[0]ã‚’ã€æ¨ªã«åˆ†å‰²ã—ã¾ã™ã€‚rect[0]ã¨rect[2]ãŒã§ãã¾ã—ãŸã€‚1-11. rect[2]ã‚’ã¾ãŸãã“ã¨ã«ãªã‚Šã€å›°ã‚Šã¾ã™ã€‚1-12. ã“ã®ã‚ˆã†ã«è³¢ã分割ã™ã‚‹ã‚ˆã†ã«ã—ã¦ã‚‚ã„ã„ã§ã™ã€‚2-1. タスクã®ã‚¤ãƒ¡ãƒ¼ã‚¸ã€‚
Dictionary of Algorithms and Data Structures
absolute performance guarantee abstract data type (a,b)-tree accepting state Ackermann's function active data structure acyclic directed graph: see directed acyclic graph acyclic graph adaptive heap sort adaptive Huffman coding adaptive k-d tree adaptive sort address-calculation sort adjacency-list representation adjacency-matrix representation adjacent admissible vertex ADT: see abstract data typ
Project Euler - PukiWiki
Project Euler †プãƒã‚°ãƒ©ãƒ ã§è§£ãæ•°å¦ã®å•é¡Œé›†ã§ã™ã€‚ å…¬å¼ã‚µã‚¤ãƒˆ é©å½“ã«å’Œè¨³ã—ã¦ã¾ã™ã€‚我ã“ãã¯ã¨æ€ã†äººã¯ãƒ©ã‚¤ã‚»ãƒ³ã‚¹ã‚’確èªã—ãŸä¸Šã§è‡ªç”±ã«æ›¸ã„ã¦ãã ã•ã„。 ↑
About - Project Euler
About Project Euler What is Project Euler? Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems. The motivation for starting Project Euler, and
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Algorithms for Decision Making
TheAlgorithms/Python: All Algorithms implemented in Python
http://www.sat.t.u-tokyo.ac.jp/~omi/random_variables_generation.html
https://www.ishikawa-lab.com/montecarlo/4shou.html
http://spheresofa.net/blog/?p=1044
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