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Function: driver

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Function: initiateCache

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Function: require_once

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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

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
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[창의 퍼즐] [수 분할] 사다리타기와 사다리수
이과생 2020.08.23 05:14 조회 942
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

5명이 사다리타기를 한다. 가로선의 개수는 4개이다. 그리고 각각의 사람이 움직이는 선의 개수의 합이 21개이다. 다섯 명이 각각 5개, 3개, 3개, 3개, 7개의 선을 움직이는 사다리가 존재한다 했을 때, (5, 3, 3, 3, 7)을 21의 ' 5분할 사다리수'라고 하자.(누구 맘대로? 내맘대로!) 21의 '5분할 사다리수'는 모두 몇 개인가?

(단, (5, 3, 3, 3, 7)과 (3, 3, 3, 5, 7)은 같은 것으로 본다.)

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