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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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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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Line: 17
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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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Line: 18
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: initMenu
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Function: __construct
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Line: 799
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Function: getComment
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Line: 18
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Line: 315
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Line: 19
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 322
Function: model
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 392
Function: getFloatingMyInfo
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 559
Function: get_footer
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
원파
2020.05.28 09:26
조회 720
수확동굴이라는 잡지는 1년에 12권, 즉 1달에 1권씩 만들어진다.
수확동굴은 매우 인기가 없어 5가구만이 정기구독을 하며, 정기구독자만 잡지를 구매한다.
각 가구를 가,나,다,라,마 라고 하자.
아래는 이동가능한 두 위치를 모두 적은 것이다.
편집실 - 가
편집실 - 나
편집실 - 라
편집실 - 마
가 - 나
가 - 다
가 - 라
나 - 다
나 - 마
다 - 라
라 - 마
위에 나타나있지 않은 경로는 어느어느 이유로 이동이 불가능하다고 하자.
그러면 편집실에서 다섯 가구에 모두 잡지를 배송한 뒤 다시 편집실로 돌아올 때 가능한 경로의 수는?
-
버블몬님! 저 경로 중에 예를 들어서 맨 마지막에 라 - 마가 있잖아요? 저걸 풀이할 때 마 - 라로 가도 돼요? 아니면 무조건 라에서 마로만 갈 수 있는 거에요?
-
원파
Lv.9
2020.05.28 18:40
이동가능한 경로니까 반대로도 당연히 가능하죠.
좋아요0
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