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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/Article.php
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Function: require_once

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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
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Function: initiateCache

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.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: require_once

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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/models/ver3/Contents_model.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

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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/models/ver3/Article_model.php
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Function: urldecode

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.php
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Function: initBoardView

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
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Function: require_once

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[개념 기사] 최대공약수를 구하는 법
뉴_턴 2020.04.30 05:19

우리는 보통 최대공약수를 두가지 방법으로 나누어서 계산한다. (최대공약수란, 두개 이상의 자연수의 공약수 중 가장 큰수이다) 첫번째 방법은, 같은 수로 나누어서 나눈 수들을 곱하는 방법이다.

두번째 방법은, 수들을 소인수분해하여 공통으로 들어간 소인수들의 곱을 구하는 것이다.

하지만 이 두 방법은 수들이 너무 큰 경우에는 사용하기 힘들다. 그렇다면 다른 쉬운 방법은 없을까. 방법은 바로 "유클리드 호제법"을 이용하는 것이다. 이 유클리드 호제법을 이용하면 큰 수들의 최대공약수를 금방찾을 수 있다. 방법은 이렇다. 우선 두수를 나열한다. 그 다음, 두 수 중 작은 수의 배수를 최대한 다른 수보다 작으면서 가깝게 만들어서 큰수에서 작은 수의 배수를 뺀다. 이 과정을 계속 반복하다 보면, 어떤 수는 0이 되고, 다른 수는 어떤 숫자가 될 것이다. 그러면 이 숫자가 바로 두 수의 최대공약수이다.

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Severity: Warning

Message: Undefined variable $tag_news_list

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Backtrace:

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/article_view.php
Line: 90
Function: _error_handler

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.php
Line: 221
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

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Backtrace:

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Type: TypeError

Message: count(): Argument #1 ($value) must be of type Countable|array, null given

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Backtrace:

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Article.php
Line: 221
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once