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		<title>백준 16918번 (봄버맨, C++, Simulation) [BAEKJOON]</title>
		<link>https://lycos7560.com/cpp/baekjoon_online_judge/baekjoon-16918-bombman-simulation/3175/</link>
					<comments>https://lycos7560.com/cpp/baekjoon_online_judge/baekjoon-16918-bombman-simulation/3175/#respond</comments>
		
		<dc:creator><![CDATA[lycos7560]]></dc:creator>
		<pubDate>Sat, 10 Dec 2022 04:47:01 +0000</pubDate>
				<category><![CDATA[BaekjoonOnlineJudge]]></category>
		<category><![CDATA[C++/CPP]]></category>
		<category><![CDATA[16917번]]></category>
		<category><![CDATA[Baekjoon]]></category>
		<category><![CDATA[bomb]]></category>
		<category><![CDATA[C++]]></category>
		<category><![CDATA[cpp]]></category>
		<category><![CDATA[simulation]]></category>
		<category><![CDATA[반례]]></category>
		<category><![CDATA[백준]]></category>
		<category><![CDATA[백준 16918]]></category>
		<category><![CDATA[백준 16918번]]></category>
		<category><![CDATA[봄버맨]]></category>
		<category><![CDATA[시뮬레이션]]></category>
		<category><![CDATA[알고리즘]]></category>
		<category><![CDATA[예제]]></category>
		<category><![CDATA[코딩테스트]]></category>
		<category><![CDATA[코테]]></category>
		<guid isPermaLink="false">https://lycos7560.com/?p=3175</guid>

					<description><![CDATA[<p>백준(BeakJoon) 16918번 문제를 풀이한 내용의 글입니다. 게임의 기능을 분류하여 코드를 작성하였습니다.  (This is an article that solves question no.16918 by Baek Joon. I classified the functions of the game and wrote the code.)</p>
<p>The post <a href="https://lycos7560.com/cpp/baekjoon_online_judge/baekjoon-16918-bombman-simulation/3175/">백준 16918번 (봄버맨, C++, Simulation) [BAEKJOON]</a> appeared first on <a href="https://lycos7560.com">어제와 내일의 나 그 사이의 이야기</a>.</p>
]]></description>
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<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h1 class="wp-block-heading">봄버맨</h1>



<p class="has-medium-font-size"><a href="https://www.acmicpc.net/problem/16918" target="_blank" rel="noreferrer noopener">https://www.acmicpc.net/problem/16918</a></p>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<figure id="problem-info" class="wp-block-table"><table><thead><tr><th>시간 제한</th><th>메모리 제한</th><th>제출</th><th>정답</th><th>맞힌 사람</th><th>정답 비율</th></tr></thead><tbody><tr><td>2 초</td><td>512 MB</td><td>7889</td><td>3216</td><td>2314</td><td>41.218%</td></tr></tbody></table></figure>



<div style="height:80px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">문제</h2>



<p class="has-medium-font-size"><a href="https://en.wikipedia.org/wiki/Bomberman">봄버맨</a>은 크기가 R×C인 직사각형 격자판 위에서 살고 있다. 격자의 각 칸은 비어있거나 폭탄이 들어있다.</p>



<p class="has-medium-font-size">폭탄이 있는 칸은 3초가 지난 후에 폭발하고, 폭탄이 폭발한 이후에는 폭탄이 있던 칸이 파괴되어 빈 칸이 되며, 인접한 네 칸도&nbsp;함께 파괴된다. </p>



<p class="has-medium-font-size">즉, 폭탄이 있던 칸이 (i, j)인 경우에 (i+1, j), (i-1, j), (i, j+1), (i, j-1)도 함께 파괴된다. </p>



<p class="has-medium-font-size">만약, 폭탄이 폭발했을 때, 인접한 칸에 폭탄이 있는 경우에는 인접한 폭탄은 폭발 없이 파괴된다. </p>



<p class="has-medium-font-size">따라서, 연쇄 반응은 없다.</p>



<p class="has-medium-font-size">봄버맨은 폭탄에 면역력을 가지고 있어서, 격자판의 모든 칸을 자유롭게 이동할 수 있다. 봄버맨은 다음과 같이 행동한다.</p>



<div style="height:36px" aria-hidden="true" class="wp-block-spacer"></div>



<p class="has-medium-font-size">가장 처음에 봄버맨은 일부 칸에 폭탄을 설치해 놓는다. 모든 폭탄이 설치된 시간은 같다.</p>



<p class="has-medium-font-size">다음 1초 동안 봄버맨은 아무것도 하지 않는다.</p>



<p class="has-medium-font-size">다음 1초 동안 폭탄이 설치되어 있지 않은 모든 칸에 폭탄을 설치한다. 즉, 모든 칸은 폭탄을 가지고 있게 된다. </p>



<p class="has-medium-font-size">폭탄은 모두 동시에 설치했다고 가정한다.</p>



<p class="has-medium-font-size">1초가 지난 후에 3초 전에 설치된 폭탄이 모두 폭발한다.</p>



<p class="has-medium-font-size">3과 4를 반복한다.</p>



<div style="height:38px" aria-hidden="true" class="wp-block-spacer"></div>



<p class="has-medium-font-size">폭탄을 설치해놓은 초기 상태가 주어졌을 때, N초가 흐른 후의 격자판 상태를 구하려고 한다.</p>



<p class="has-medium-font-size">예를 들어, 초기 상태가 아래와 같은 경우를 보자.</p>



<div style="height:43px" aria-hidden="true" class="wp-block-spacer"></div>



<figure class="wp-block-image size-full"><img fetchpriority="high" decoding="async" width="1464" height="443" src="https://lycos7560.com/wp-content/uploads/image-588.png" alt="" class="wp-image-3176" srcset="https://lycos7560.com/wp-content/uploads/image-588.png 1464w, https://lycos7560.com/wp-content/uploads/image-588-300x91.png 300w, https://lycos7560.com/wp-content/uploads/image-588-768x232.png 768w" sizes="(max-width: 1464px) 100vw, 1464px" /></figure>



<div style="height:112px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">입력</h2>



<p class="has-medium-font-size">첫째 줄에 R, C, N (1 ≤ R, C, N ≤ 200)이 주어진다. 둘째 줄부터 R개의 줄에 격자판의 초기 상태가 주어진다. </p>



<p class="has-medium-font-size">빈 칸은 &#8216;<code>.</code>&#8216;로, 폭탄은 &#8216;<code>O</code>&#8216;로 주어진다.</p>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">출력</h2>



<p class="has-medium-font-size">총 R개의 줄에 N초가 지난 후의 격자판 상태를 출력한다.</p>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">예제 입력 1&nbsp;</h2>



<pre class="EnlighterJSRAW" data-enlighter-language="cpp" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">6 7 3
.......
...O...
....O..
.......
OO.....
OO.....</pre>



<div style="height:21px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">예제 출력 1&nbsp;</h2>



<pre class="EnlighterJSRAW" data-enlighter-language="cpp" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">OOO.OOO
OO...OO
OOO...O
..OO.OO
...OOOO
...OOOO</pre>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">예제 입력 2&nbsp;</h2>



<pre class="EnlighterJSRAW" data-enlighter-language="cpp" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">6 7 4
.......
...O...
....O..
.......
OO.....
OO.....</pre>



<div style="height:30px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">예제 출력 2</h2>



<pre class="EnlighterJSRAW" data-enlighter-language="cpp" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">OOOOOOO
OOOOOOO
OOOOOOO
OOOOOOO
OOOOOOO
OOOOOOO</pre>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">예제 입력 3</h2>



<pre class="EnlighterJSRAW" data-enlighter-language="cpp" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">6 7 5
.......
...O...
....O..
.......
OO.....
OO.....</pre>



<div style="height:42px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">예제 출력 3</h2>



<pre class="EnlighterJSRAW" data-enlighter-language="cpp" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">.......
...O...
....O..
.......
OO.....
OO.....</pre>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">힌트</h2>



<p class="has-medium-font-size">아래는 시간이 지난 후 예제 격자판의 상태이다.</p>



<div style="height:35px" aria-hidden="true" class="wp-block-spacer"></div>



<figure class="wp-block-image size-full"><img decoding="async" width="1461" height="1068" src="https://lycos7560.com/wp-content/uploads/image-589.png" alt="" class="wp-image-3177" srcset="https://lycos7560.com/wp-content/uploads/image-589.png 1461w, https://lycos7560.com/wp-content/uploads/image-589-300x219.png 300w, https://lycos7560.com/wp-content/uploads/image-589-768x561.png 768w" sizes="(max-width: 1461px) 100vw, 1461px" /></figure>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">출처</h2>



<ul class="wp-block-list">
<li>문제를 번역한 사람:&nbsp;<a href="https://www.acmicpc.net/user/baekjoon" target="_blank" rel="noreferrer noopener">baekjoon</a></li>
</ul>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">알고리즘 분류</h2>



<ul class="wp-block-list">
<li><a href="https://www.acmicpc.net/problem/tag/102" target="_blank" rel="noreferrer noopener">구현</a></li>



<li><a href="https://www.acmicpc.net/problem/tag/7" target="_blank" rel="noreferrer noopener">그래프 이론</a></li>



<li><a href="https://www.acmicpc.net/problem/tag/11" target="_blank" rel="noreferrer noopener">그래프 탐색</a></li>



<li><a href="https://www.acmicpc.net/problem/tag/141" target="_blank" rel="noreferrer noopener">시뮬레이션</a></li>
</ul>



<hr class="wp-block-separator has-alpha-channel-opacity is-style-wide" style="margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)"/>



<div style="height:56px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">폭발할 폭탄의 리스트를 작성하는 함수</h2>



<figure class="wp-block-image size-full"><img decoding="async" width="975" height="397" src="https://lycos7560.com/wp-content/uploads/image-592.png" alt="" class="wp-image-3182" srcset="https://lycos7560.com/wp-content/uploads/image-592.png 975w, https://lycos7560.com/wp-content/uploads/image-592-300x122.png 300w, https://lycos7560.com/wp-content/uploads/image-592-768x313.png 768w" sizes="(max-width: 975px) 100vw, 975px" /></figure>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">맵의 빈 공간을 폭탄으로 바꾸어주는 함수</h2>



<figure class="wp-block-image size-full"><img decoding="async" width="615" height="319" src="https://lycos7560.com/wp-content/uploads/image-591.png" alt="" class="wp-image-3181" srcset="https://lycos7560.com/wp-content/uploads/image-591.png 615w, https://lycos7560.com/wp-content/uploads/image-591-300x156.png 300w" sizes="(max-width: 615px) 100vw, 615px" /></figure>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">리스트의 폭탄을 폭발시키는 함수</h2>



<p class="has-medium-font-size">폭탄은 한번에 폭발함으로 맵에 있는 폭탄과는 관계가 없이 리스트의 폭탄 위치의 상/하/좌/우 를 빈공간으로 만들어 줍니다. </p>



<p class="has-medium-font-size">빈공간으로 바꾸어줄떄 허용된 범위를 벗어나는지 체크</p>



<div style="height:34px" aria-hidden="true" class="wp-block-spacer"></div>



<figure class="wp-block-image size-full"><img decoding="async" width="1176" height="989" src="https://lycos7560.com/wp-content/uploads/image-590.png" alt="" class="wp-image-3180" srcset="https://lycos7560.com/wp-content/uploads/image-590.png 1176w, https://lycos7560.com/wp-content/uploads/image-590-300x252.png 300w, https://lycos7560.com/wp-content/uploads/image-590-768x646.png 768w" sizes="(max-width: 1176px) 100vw, 1176px" /></figure>



<div style="height:52px" aria-hidden="true" class="wp-block-spacer"></div>



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     (adsbygoogle = window.adsbygoogle || []).push({});
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<div style="height:50px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">위의 기능들을 따로 구현하고 힌트에서 알려주는 로직대로 코드를 작성하였습니다.</h2>



<div style="height:33px" aria-hidden="true" class="wp-block-spacer"></div>



<figure class="wp-block-image size-full"><img decoding="async" width="1335" height="1040" src="https://lycos7560.com/wp-content/uploads/image-557-1.png" alt="" class="wp-image-3183" srcset="https://lycos7560.com/wp-content/uploads/image-557-1.png 1335w, https://lycos7560.com/wp-content/uploads/image-557-1-300x234.png 300w, https://lycos7560.com/wp-content/uploads/image-557-1-768x598.png 768w" sizes="(max-width: 1335px) 100vw, 1335px" /></figure>



<div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div>



<h2 class="wp-block-heading">통과된 코드</h2>



<pre class="EnlighterJSRAW" data-enlighter-language="cpp" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">#include &lt;iostream>
#include &lt;list>

using namespace std;

// R, C, N 의 최대값 매크로
constexpr auto MAX = 200;

// 격자판 구현
// 범위 0 ~ 199
char map[MAX][MAX];

// 디버그용
bool debug = true;

int R, C, N;

// 지난 시간을 카운트
int timeCnt;

// 폭발할 폭탄의 위치를 가지는 리스트
list&lt;pair&lt;int, int>> locationBombList;
list&lt;pair&lt;int, int>>::iterator iterListBomb;

// 폭탄의 터지는 방향 정의
int dirExplosion[4][2] = { {0, 1}, {1, 0}, {0, -1}, {-1, 0} };


// 시각적을 확인하기 위함
void DebugPrint()
{
	for (int i = 0; i &lt; R; i++)
	{
		for (int j = 0; j &lt; C; j++)
		{
			cout &lt;&lt; map[i][j]; //&lt;&lt; " ";
		}

		cout &lt;&lt; "\n";
	}
}

// 초기화를 하는 함수
void Initialization()
{
	// 시간 초기화
	timeCnt = 0;

	// 모두 빈칸으로 초기화
	for (int i = 0; i &lt; MAX; i++)
	{
		for (int j = 0; j &lt; MAX; j++)
		{
			map[i][j] = '.';
		}
	}
}

// 입력을 받는 함수
void GetInput()
{
	cin >> R >> C >> N;

	// 초기 맵 입력받기
	for (int i = 0; i &lt; R; i++)
	{
		for (int j = 0; j &lt; C; j++)
		{
			cin >> map[i][j];
		}
	}
}



// 폭발할 폭탄의 리스트를 작성합니다.
void CreateBombList()
{
	// 리스트를 초기화
	locationBombList.clear();

	// 정해진 범위 내에서 폭탄을 찾아서 리스트에 추가합니다.
	for (int i = 0; i &lt; R; i++)
	{
		for (int j = 0; j &lt; C; j++)
		{
			if (map[i][j] == 'O')
			{
				locationBombList.push_back(make_pair(i, j));
			}
		}
	}
}

// 빈공간이면 폭탄으로 바꾸어 줍니다.
void BlankSpaceBombFilling()
{
	for (int i = 0; i &lt; R; i++)
	{
		for (int j = 0; j &lt; C; j++)
		{
			if (map[i][j] == '.')
			{
				map[i][j] = 'O';
			}
		}
	}
}

// 리스트의 폭탄을 폭발시킵니다.
void bombExplosion()
{
	pair&lt;int, int> tempPair;

	for (iterListBomb = locationBombList.begin(); iterListBomb != locationBombList.end(); iterListBomb++)
	{
		tempPair.first = iterListBomb->first;
		tempPair.second = iterListBomb->second;

		//자신의 위치를 빈공간으로 만들어 줍니다.
		map[tempPair.first][tempPair.second] = '.';

		// 폭탄의 상 하 좌 우를 빈공간으로 만들어 줍니다.
		for (int i = 0; i &lt; 4; i++)
		{
			// 허용된 범위를 벗어나면 넘긴다.
			if (tempPair.first + dirExplosion[i][0] &lt;= -1 || tempPair.first + dirExplosion[i][0] >= R 
				|| tempPair.second + dirExplosion[i][1] &lt;= -1 || tempPair.second + dirExplosion[i][1] >= C)
			{
				continue;
			}

			// 상하좌우를 빈공간으로 만들어줍니다. (폭발 효과)
			switch (i)
			{
				case 0:
					map[tempPair.first + dirExplosion[i][0]][tempPair.second + dirExplosion[i][1]] = '.';
					break;

				case 1:

					map[tempPair.first + dirExplosion[i][0]][tempPair.second + dirExplosion[i][1]] = '.';
					break;

				case 2:
					map[tempPair.first + dirExplosion[i][0]][tempPair.second + dirExplosion[i][1]] = '.';
					break;

				case 3:
					map[tempPair.first + dirExplosion[i][0]][tempPair.second + dirExplosion[i][1]] = '.';
					break;
			}

		}
	}
}

// 게임을 시작
void StartGame()
{
	CreateBombList();
	timeCnt++;
	if (timeCnt == N) { return; }

	BlankSpaceBombFilling();
	timeCnt++;
	if (timeCnt == N) { return; }

	// 원하는 시간이 될때까지 진행
	while (true)
	{
		bombExplosion();
		CreateBombList();
		timeCnt++;
		if (timeCnt == N) { break; }

		BlankSpaceBombFilling();
		timeCnt++;
		if (timeCnt == N) { break; }
	}
}

int main()
{
	Initialization();
	GetInput();
	StartGame();

	if (debug) { DebugPrint(); }

	return 0;
}
</pre>



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<p>The post <a href="https://lycos7560.com/cpp/baekjoon_online_judge/baekjoon-16918-bombman-simulation/3175/">백준 16918번 (봄버맨, C++, Simulation) [BAEKJOON]</a> appeared first on <a href="https://lycos7560.com">어제와 내일의 나 그 사이의 이야기</a>.</p>
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