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문제

2012년 12월 31일 새벽 4시부터 지상파 아날로그 TV방송이 종료되었다. TV를 자주보는 할머니를 위해서, 상근이네 집도 디지털 수신기를 구입했다.

원래 상근이네 집에는 KBS1과 KBS2만 나왔다. 할머니는 두 방송만 시청한다. 이제 디지털 수신기와 함께 엄청난 양의 채널을 볼 수 있게 되었다.  하지만, 할머니는 오직 KBS1과 KBS2만 보려고 한다. 따라서, 상근이는 채널 리스트를 조절해 KBS1을 첫 번째로, KBS2를 두 번째로 만들려고 한다.

티비를 켜면 디지털 수신기는 시청 가능한 채널 리스트를 보여준다. 모든 채널의 이름은 서로 다르고, 항상 KBS1과 KBS2를 포함하고 있다. 상근이는 이 리모콘을 이용해서 리스트의 순서를 바꾸는 법을 알아냈다. 리스트의 왼편에는 작은 화살표가 있고, 이 화살표는 현재 선택한 채널을 나타낸다. 가장 처음에 화살표는 제일 첫 번째 채널을 가리키고 있다.

다음과 같은 네 가지 버튼을 이용해서 리스트의 순서를 바꿀 수 있다. 각각은 1번부터 4번까지 번호가 적혀져있는 버튼이다.

  1. 화살표를 한 칸 아래로 내린다. (채널 i에서 i+1로)
  2. 화살표를 위로 한 칸 올린다. (채널 i에서 i-1로)
  3. 현재 선택한 채널을 한 칸 아래로 내린다. (채널 i와 i+1의 위치를 바꾼다. 화살표는 i+1을 가리키고 있는다)
  4. 현재 선택한 채널을 위로 한 칸 올린다. (채널 i와 i-1의 위치를 바꾼다. 화살표는 i-1을 가리키고 있다)

화살표가 채널 리스트의 범위를 넘어간다면, 그 명령은 무시한다.

현재 채널 리스트의 순서가 주어졌을 때, KBS1를 첫 번째로, KBS2를 두 번째로 순서를 바꾸는 방법을 구하는 프로그램을 작성하시오. 방법의 길이는 500보다 작아야 한다. 두 채널을 제외한 나머지 채널의 순서는 상관없다.

입력

첫째 줄에 채널의 수 N이 주어진다. (2 ≤ N ≤ 100)

다음 N개 줄에는 채널의 이름이 한 줄에 하나씩 주어진다. 채널의 이름은 최대 10글자이고, 알파벳 대문자와 숫자로만 이루어져 있다.

이미 KBS1이 첫 번째에, KBS2가 두 번째에 있는 입력은 주어지지 않는다.

출력

상근이가 눌러야 하는 버튼을 순서대로 공백없이 출력한다.

예제 입력 1

3
MBC
KBS1
KBS2

예제 출력 1

33

예제 입력 2

4
ABC1
ABC02
KBS2
KBS1

예제 출력 2

11144411144

예제 입력 3

4
ABC1
ABC02
KBS2
KBS1

예제 출력 3

33144413
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TV\ub97c \uc790\uc8fc\ubcf4\ub294 \ud560\uba38\ub2c8\ub97c \uc704\ud574\uc11c, \uc0c1\uadfc\uc774\ub124 \uc9d1\ub3c4 \ub514\uc9c0\ud138 \uc218\uc2e0\uae30\ub97c \uad6c\uc785\ud588\ub2e4.<\/p>\r\n\r\n<p>\uc6d0\ub798 \uc0c1\uadfc\uc774\ub124 \uc9d1\uc5d0\ub294 KBS1\uacfc KBS2\ub9cc \ub098\uc654\ub2e4. \ud560\uba38\ub2c8\ub294 \ub450 \ubc29\uc1a1\ub9cc \uc2dc\uccad\ud55c\ub2e4. \uc774\uc81c \ub514\uc9c0\ud138 \uc218\uc2e0\uae30\uc640 \ud568\uaed8 \uc5c4\uccad\ub09c \uc591\uc758 \ucc44\ub110\uc744 \ubcfc \uc218 \uc788\uac8c \ub418\uc5c8\ub2e4. &nbsp;\ud558\uc9c0\ub9cc, \ud560\uba38\ub2c8\ub294 \uc624\uc9c1 KBS1\uacfc KBS2\ub9cc \ubcf4\ub824\uace0 \ud55c\ub2e4. \ub530\ub77c\uc11c, \uc0c1\uadfc\uc774\ub294 \ucc44\ub110 \ub9ac\uc2a4\ud2b8\ub97c \uc870\uc808\ud574 KBS1\uc744 \uccab \ubc88\uc9f8\ub85c, KBS2\ub97c \ub450 \ubc88\uc9f8\ub85c \ub9cc\ub4e4\ub824\uace0 \ud55c\ub2e4.<\/p>\r\n\r\n<p>\ud2f0\ube44\ub97c \ucf1c\uba74 \ub514\uc9c0\ud138 \uc218\uc2e0\uae30\ub294 \uc2dc\uccad \uac00\ub2a5\ud55c \ucc44\ub110 \ub9ac\uc2a4\ud2b8\ub97c \ubcf4\uc5ec\uc900\ub2e4. \ubaa8\ub4e0 \ucc44\ub110\uc758 \uc774\ub984\uc740 \uc11c\ub85c \ub2e4\ub974\uace0, \ud56d\uc0c1 KBS1\uacfc KBS2\ub97c \ud3ec\ud568\ud558\uace0 \uc788\ub2e4. \uc0c1\uadfc\uc774\ub294 \uc774 \ub9ac\ubaa8\ucf58\uc744 \uc774\uc6a9\ud574\uc11c \ub9ac\uc2a4\ud2b8\uc758 \uc21c\uc11c\ub97c \ubc14\uafb8\ub294 \ubc95\uc744 \uc54c\uc544\ub0c8\ub2e4. \ub9ac\uc2a4\ud2b8\uc758 \uc67c\ud3b8\uc5d0\ub294 \uc791\uc740 \ud654\uc0b4\ud45c\uac00 \uc788\uace0, \uc774 \ud654\uc0b4\ud45c\ub294 \ud604\uc7ac \uc120\ud0dd\ud55c \ucc44\ub110\uc744 \ub098\ud0c0\ub0b8\ub2e4. \uac00\uc7a5 \ucc98\uc74c\uc5d0 \ud654\uc0b4\ud45c\ub294 \uc81c\uc77c \uccab \ubc88\uc9f8 \ucc44\ub110\uc744 \uac00\ub9ac\ud0a4\uace0 \uc788\ub2e4.<\/p>\r\n\r\n<p>\ub2e4\uc74c\uacfc \uac19\uc740 \ub124 \uac00\uc9c0 \ubc84\ud2bc\uc744 \uc774\uc6a9\ud574\uc11c \ub9ac\uc2a4\ud2b8\uc758 \uc21c\uc11c\ub97c \ubc14\uafc0 \uc218 \uc788\ub2e4. \uac01\uac01\uc740 1\ubc88\ubd80\ud130 4\ubc88\uae4c\uc9c0 \ubc88\ud638\uac00 \uc801\ud600\uc838\uc788\ub294 \ubc84\ud2bc\uc774\ub2e4.<\/p>\r\n\r\n<ol>\r\n\t<li>\ud654\uc0b4\ud45c\ub97c \ud55c \uce78 \uc544\ub798\ub85c \ub0b4\ub9b0\ub2e4. (\ucc44\ub110 i\uc5d0\uc11c i+1\ub85c)<\/li>\r\n\t<li>\ud654\uc0b4\ud45c\ub97c \uc704\ub85c \ud55c \uce78 \uc62c\ub9b0\ub2e4. (\ucc44\ub110 i\uc5d0\uc11c i-1\ub85c)<\/li>\r\n\t<li>\ud604\uc7ac \uc120\ud0dd\ud55c \ucc44\ub110\uc744 \ud55c \uce78 \uc544\ub798\ub85c \ub0b4\ub9b0\ub2e4. (\ucc44\ub110 i\uc640 i+1\uc758 \uc704\uce58\ub97c \ubc14\uafbc\ub2e4. \ud654\uc0b4\ud45c\ub294 i+1\uc744 \uac00\ub9ac\ud0a4\uace0 \uc788\ub294\ub2e4)<\/li>\r\n\t<li>\ud604\uc7ac \uc120\ud0dd\ud55c \ucc44\ub110\uc744 \uc704\ub85c \ud55c \uce78 \uc62c\ub9b0\ub2e4. (\ucc44\ub110 i\uc640 i-1\uc758 \uc704\uce58\ub97c \ubc14\uafbc\ub2e4. \ud654\uc0b4\ud45c\ub294 i-1\uc744 \uac00\ub9ac\ud0a4\uace0 \uc788\ub2e4)<\/li>\r\n<\/ol>\r\n\r\n<p>\ud654\uc0b4\ud45c\uac00 \ucc44\ub110 \ub9ac\uc2a4\ud2b8\uc758 \ubc94\uc704\ub97c \ub118\uc5b4\uac04\ub2e4\uba74, \uadf8 \uba85\ub839\uc740 \ubb34\uc2dc\ud55c\ub2e4.<\/p>\r\n\r\n<p>\ud604\uc7ac \ucc44\ub110 \ub9ac\uc2a4\ud2b8\uc758 \uc21c\uc11c\uac00 \uc8fc\uc5b4\uc84c\uc744 \ub54c, KBS1\ub97c \uccab \ubc88\uc9f8\ub85c, KBS2\ub97c \ub450 \ubc88\uc9f8\ub85c \uc21c\uc11c\ub97c \ubc14\uafb8\ub294 \ubc29\ubc95\uc744 \uad6c\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud558\uc2dc\uc624. \ubc29\ubc95\uc758 \uae38\uc774\ub294 500\ubcf4\ub2e4 \uc791\uc544\uc57c \ud55c\ub2e4. \ub450 \ucc44\ub110\uc744 \uc81c\uc678\ud55c \ub098\uba38\uc9c0 \ucc44\ub110\uc758 \uc21c\uc11c\ub294 \uc0c1\uad00\uc5c6\ub2e4.<\/p>\r\n","input":"<p>\uccab\uc9f8 \uc904\uc5d0 \ucc44\ub110\uc758 \uc218 N\uc774 \uc8fc\uc5b4\uc9c4\ub2e4. (2 &le; N &le; 100)<\/p>\r\n\r\n<p>\ub2e4\uc74c N\uac1c \uc904\uc5d0\ub294 \ucc44\ub110\uc758 \uc774\ub984\uc774 \ud55c \uc904\uc5d0 \ud558\ub098\uc529 \uc8fc\uc5b4\uc9c4\ub2e4. \ucc44\ub110\uc758 \uc774\ub984\uc740 \ucd5c\ub300 10\uae00\uc790\uc774\uace0, \uc54c\ud30c\ubcb3 \ub300\ubb38\uc790\uc640 \uc22b\uc790\ub85c\ub9cc \uc774\ub8e8\uc5b4\uc838 \uc788\ub2e4.<\/p>\r\n\r\n<p>\uc774\ubbf8 KBS1\uc774 \uccab \ubc88\uc9f8\uc5d0, KBS2\uac00 \ub450 \ubc88\uc9f8\uc5d0 \uc788\ub294 \uc785\ub825\uc740 \uc8fc\uc5b4\uc9c0\uc9c0 \uc54a\ub294\ub2e4.<\/p>\r\n","output":"<p>\uc0c1\uadfc\uc774\uac00 \ub20c\ub7ec\uc57c \ud558\ub294 \ubc84\ud2bc\uc744 \uc21c\uc11c\ub300\ub85c \uacf5\ubc31\uc5c6\uc774 \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"","original":"0","html_title":"0","problem_lang_tcode":"Korean"},{"problem_id":"2816","problem_lang":"1","title":"DIGITALNA","description":"<p>A while ago, Mirko&rsquo;s grandparents had to switch from analog to digital TV receiver. On their old analog receiver they could watch only two channels: KBS1 and KBS2. Switching to digital receiver they gained dozens of new channels, but they still wanted to watch just the two channels they had before. They asked Mirko to adjust the remote control in a way that KBS1 is on first and KBS2 on the second key.&nbsp;<\/p>\r\n\r\n<p>When switched on, digital receiver creates a list of available channels. All of the channels are distinct and the list always contains KBS1 and KBS2. Mirko found the remote and he started adjusting the receiver. Menu contains the channel list and a little arrow which is marking the currently selected channel. After entering the menu, the arrow is marking the first channel on the list.&nbsp;<\/p>\r\n\r\n<p>There are four operations in the menu, denoted with numbers 1 to 4:&nbsp;<\/p>\r\n\r\n<ol>\r\n\t<li>move the arrow one place down (from channel i to channel i+1)&nbsp;<\/li>\r\n\t<li>move the arrow one place up (from channel i to channel i-1)&nbsp;<\/li>\r\n\t<li>move the arrow and selected channel one place down (channel i and channel i+1 are switching places, arrow ends up in place i+1)&nbsp;<\/li>\r\n\t<li>move the arrow and selected channel one place up (channel i and channel i-1 are switching places, arrow ends up in place i-1)&nbsp;<\/li>\r\n<\/ol>\r\n\r\n<p>Menu is robust, so invalid commands (such as a command which would move the arrow outside of the channel list) are just ignored.&nbsp;<\/p>\r\n\r\n<p>Write a program which will, given a channel list, output a sequence of any operations such that, after they are executed, KBS1 will be on the first, and KBS2 on the second place in channel list. Additionally, the sequence length should be less than 500. Ordering of all other channels is arbitrary.&nbsp;<\/p>\r\n","input":"<p>First line of input contains a positive integer N (2 &le; N &le; 100), number of channels.&nbsp;<\/p>\r\n\r\n<p>Next N lines contain a list of channels generated by the digital receiver. Each line contains the name of one channel. Channel name is a sequence of at most 10 characters - capital letters of English alphabet and digits.&nbsp;<\/p>\r\n\r\n<p>Input sequence is created in such way that it will always be required to make at least one operation.&nbsp;<\/p>\r\n","output":"<p>First and only line of output should contain the sequence of Mirko&rsquo;s commands with no spaces in between.&nbsp;<\/p>\r\n","hint":"","original":"1","html_title":"0","problem_lang_tcode":"English"}]

출처

Contest > Croatian Open Competition in Informatics > COCI 2011/2012 > Contest #3 1번

  • 문제를 번역한 사람: baekjoon
  • 문제의 오타를 찾은 사람: rdd6584