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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
Line: 17
Function: initiateCache
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
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Function: require_once
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
Line: 22
Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
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Function: require_once
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Line: 17
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: getFloatingMyInfo
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Line: 559
Function: get_footer
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
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Function: require_once
수학동아 - 폴리매스
어제 학원끝나고 slither.io라는 지렁이게임을했습니다. 생각보다 재밌더군요 ㅎ
게임에서는 한 지렁이의 머리와 다른 지렁이의 몸통이 부딪히면 머리가 부딪힌 지렁이가 죽습니다.
게임을 하다가 생각난 문제인데 잘 안풀려서 올립니다....
우선, nxn 모양 칸에 1x2 크기의 지렁이들을 겹치지 않게 배열합니다.
이때, 지렁이의 머리와 꼬리를 각각 칸 1개라고 생각하고, 머리와 머리가 부딪히지 않게(가로 또는 세로로 직접적으로 부딪혀야합니다) 배열하는 방법이 몇가지일까요...?(n은 짝수)
꼬리
머리 or (꼬리 머리) (머리 꼬리) 이렇게 만나야 부딪히는걸로 생각합니다
머리
꼬리
생각해본 방법은 여러가지인데
지렁이의 머리를 O, 꼬리를 X라 두고 n*n에 O들끼리 만나지 않게 배열하는 가짓수로 바꿔봤는데 좀처럼 답이 나오지않네요ㅠ
고수분들 도와주세요!
대충 이렇게요
+ 돌려서 같은 모양은 하나로 셉니다
-
-
우럭
Lv.9
2022.01.05 08:00
조오금 생각을 해보니까 저기서 O만 8개를 배열하는건 어떨까 싶습니다
그런데 O주변이 모두 O일 수는 없으니, 그런 경우를 빼는건 어떨까요
-
음...저도 그 방법은 생각을 해보았는데
O를 배열해도 각 지렁이들의 꼬리를 어떻게 배열하느냐에 따라 경우가 달라져서 좀 어려울 것 같네요..
위 사진처럼 O를 배열해도 지렁이 꼬리를 배열하는 가짓수가 O배열 방법마다 차이가 납니다....ㅠ
좋아요0
-
△π
Lv.9
2022.01.06 00:55
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글에 써놓지 않았네요....
돌려서 같은 모양은 하나로 세기로 했습니다
좋아요0
-
-
음...보내주신 링크에는 도미노의 앞뒤가 구분되지 않았는데 이 문제처럼 구분하게 된다면 그 수가 많이 커질 것 같네요
정보 감사합니다
좋아요0
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