시간 제한메모리 제한제출정답맞힌 사람정답 비율
1 초 128 MB36015512744.718%

문제

해빈이는 준규에게 메세지를 받았다. 준규는 세계 최고 수준의 암호학자이기 때문에 해빈이에게 암호로 메세지를 보낸다. 이번에 준규는 One Time Pad(OTP) 암호화 방식을 사용하기로 했다. 준규는 OTP방식을 제대로 적용하면 절대 해독할 수 없다는 것을 알기 때문에, 해빈이가 해석할 수 있도록 몇 가지 힌트를 같이 보내기로 했다.

준규는 메세지에 항상 영소문자, 온점('.'), 공백 (' ', ASCII코드 32)만 쓴다. 그리고 key값으로는 항상 '0'부터 '9'까지의 숫자만 쓴다. 이 사실을 알고 있는 해빈이는 이를 이용해 메세지에 있는 온점과 공백의 위치를 알 수 있다는 것을 깨닫고, 당신에게 프로그램으로 만들어달라고 부탁했다.

준규가 이런 메세지를 보낸 게 한두 번이 아니기 때문에 해빈이는 OTP 암호화 방식을 알고 있다. 예를 들어 "0120123"을 key로 사용해서 "abc efg"라는 문자열을 암호화하면 아래와 같다.

abc efg
0120123
61 62 63 20 65 66 67
30 31 32 30 31 32 33
51 53 51 10 54 54 54
Start ASCII hexadecimal excrypted message

먼저 key와 메세지 원문을 ASCII 인코딩을 사용해 16진수로 변환한다. 그리고 변환한 key와 원문을 각각 차례대로 XOR 연산한다. 그 결과가 암호화 된 메세지이다.

입력

입력에 첫 줄에는 암호화 된 메세지의 길이인 정수 N (1 ≤ N ≤ 1000)이 주어진다.

다음 줄에는 암호화 된 메세지가 N개의 16진수 정수로 주어진다. 이 수는 0(10진수) 이상 127(10진수) 이하이다.

출력

N개의 문자를 한 줄에 출력한다. 만약 i번째 글자가 문자라면 '-'를, 아니라면 '.'을 출력한다.

예제 입력 1

7
51 53 51 10 54 54 54

예제 출력 1

---.---

예제 입력 2

7
53 53 51 54 54 51 10

예제 출력 2

------.
[{"problem_id":"2892","problem_lang":"0","title":"\uc2ec\uc2ec\ud55c \uc900\uaddc","description":"<p>\ud574\ube48\uc774\ub294 \uc900\uaddc\uc5d0\uac8c \uba54\uc138\uc9c0\ub97c \ubc1b\uc558\ub2e4. \uc900\uaddc\ub294 \uc138\uacc4 \ucd5c\uace0 \uc218\uc900\uc758 \uc554\ud638\ud559\uc790\uc774\uae30 \ub54c\ubb38\uc5d0 \ud574\ube48\uc774\uc5d0\uac8c \uc554\ud638\ub85c \uba54\uc138\uc9c0\ub97c \ubcf4\ub0b8\ub2e4. \uc774\ubc88\uc5d0 \uc900\uaddc\ub294 One Time Pad(OTP) \uc554\ud638\ud654 \ubc29\uc2dd\uc744 \uc0ac\uc6a9\ud558\uae30\ub85c \ud588\ub2e4. \uc900\uaddc\ub294 OTP\ubc29\uc2dd\uc744 \uc81c\ub300\ub85c \uc801\uc6a9\ud558\uba74 \b\uc808\ub300 \ud574\ub3c5\ud560 \uc218 \uc5c6\ub2e4\ub294 \uac83\uc744 \uc54c\uae30 \ub54c\ubb38\uc5d0, \ud574\ube48\uc774\uac00 \ud574\uc11d\ud560 \uc218 \uc788\ub3c4\ub85d \uba87 \uac00\uc9c0 \ud78c\ud2b8\ub97c \uac19\uc774 \ubcf4\ub0b4\uae30\ub85c \ud588\ub2e4.<\/p>\r\n\r\n<p>\uc900\uaddc\ub294 \uba54\uc138\uc9c0\uc5d0 \ud56d\uc0c1 \uc601\uc18c\ubb38\uc790, \uc628\uc810(&#39;.&#39;), \uacf5\ubc31 (&#39; &#39;, ASCII\ucf54\ub4dc 32)\ub9cc \uc4f4\ub2e4. \uadf8\ub9ac\uace0 key\uac12\uc73c\ub85c\ub294 \ud56d\uc0c1 &#39;0&#39;\ubd80\ud130 &#39;9&#39;\uae4c\uc9c0\uc758 \uc22b\uc790\ub9cc \uc4f4\ub2e4. \uc774 \uc0ac\uc2e4\uc744 \uc54c\uace0 \uc788\ub294 \ud574\ube48\uc774\ub294 \uc774\ub97c \uc774\uc6a9\ud574 \uba54\uc138\uc9c0\uc5d0 \uc788\ub294 \uc628\uc810\uacfc \uacf5\ubc31\uc758 \uc704\uce58\ub97c \uc54c \uc218 \uc788\ub2e4\ub294 \uac83\uc744 \uae68\ub2eb\uace0, \ub2f9\uc2e0\uc5d0\uac8c \ud504\ub85c\uadf8\ub7a8\uc73c\ub85c \ub9cc\ub4e4\uc5b4\ub2ec\ub77c\uace0 \ubd80\ud0c1\ud588\ub2e4.<\/p>\r\n\r\n<p>\uc900\uaddc\uac00 \uc774\ub7f0 \uba54\uc138\uc9c0\ub97c \ubcf4\ub0b8 \uac8c \ud55c\ub450 \ubc88\uc774 \uc544\ub2c8\uae30 \ub54c\ubb38\uc5d0 \ud574\ube48\uc774\ub294 OTP \uc554\ud638\ud654 \ubc29\uc2dd\uc744 \uc54c\uace0 \uc788\ub2e4. \uc608\ub97c \ub4e4\uc5b4&nbsp;&quot;0120123&quot;\uc744 key\ub85c \uc0ac\uc6a9\ud574\uc11c&nbsp;&quot;abc efg&quot;\ub77c\ub294 \ubb38\uc790\uc5f4\uc744 \uc554\ud638\ud654\ud558\uba74 \uc544\ub798\uc640 \uac19\ub2e4.<\/p>\r\n\r\n<table class=\"table table-bordered td-center th-center\">\r\n\t<tbody>\r\n\t\t<tr>\r\n\t\t\t<td>\r\n\t\t\t<pre>\r\nabc efg\r\n0120123<\/pre>\r\n\t\t\t<\/td>\r\n\t\t\t<td>\r\n\t\t\t<pre>\r\n61 62 63 20 65 66 67\r\n30 31 32 30 31 32 33<\/pre>\r\n\t\t\t<\/td>\r\n\t\t\t<td>\r\n\t\t\t<pre>\r\n51 53 51 10 54 54 54<\/pre>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n\t<tfoot>\r\n\t\t<tr>\r\n\t\t\t<th>Start<\/th>\r\n\t\t\t<th>ASCII hexadecimal<\/th>\r\n\t\t\t<th>excrypted message<\/th>\r\n\t\t<\/tr>\r\n\t<\/tfoot>\r\n<\/table>\r\n\r\n<p>\uba3c\uc800 key\uc640 \uba54\uc138\uc9c0 \uc6d0\ubb38\uc744 ASCII \uc778\ucf54\ub529\uc744 \uc0ac\uc6a9\ud574&nbsp;16\uc9c4\uc218\ub85c \ubcc0\ud658\ud55c\ub2e4. \uadf8\ub9ac\uace0 \ubcc0\ud658\ud55c key\uc640 \uc6d0\ubb38\uc744 \uac01\uac01 \ucc28\ub840\ub300\ub85c XOR \uc5f0\uc0b0\ud55c\ub2e4. \uadf8 \uacb0\uacfc\uac00 \uc554\ud638\ud654 \ub41c \uba54\uc138\uc9c0\uc774\ub2e4.<\/p>\r\n","input":"<p>\uc785\ub825\uc5d0 \uccab \uc904\uc5d0\ub294 \uc554\ud638\ud654 \ub41c \uba54\uc138\uc9c0\uc758 \uae38\uc774\uc778 \uc815\uc218&nbsp;N (1 &le; N &le; 1000)\uc774 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\ub2e4\uc74c \uc904\uc5d0\ub294 \uc554\ud638\ud654 \ub41c \uba54\uc138\uc9c0\uac00&nbsp;N\uac1c\uc758 16\uc9c4\uc218 \uc815\uc218\ub85c \uc8fc\uc5b4\uc9c4\ub2e4. \uc774 \uc218\ub294&nbsp;0(10\uc9c4\uc218)&nbsp;\uc774\uc0c1&nbsp;127(10\uc9c4\uc218)&nbsp;\uc774\ud558\uc774\ub2e4.<\/p>\r\n","output":"<p>N\uac1c\uc758 \ubb38\uc790\ub97c \ud55c \uc904\uc5d0 \ucd9c\ub825\ud55c\ub2e4. \ub9cc\uc57d i\ubc88\uc9f8 \uae00\uc790\uac00 \ubb38\uc790\ub77c\uba74 &#39;-&#39;\ub97c, \uc544\ub2c8\ub77c\uba74 &#39;.&#39;\uc744 \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"","original":"0","html_title":"0","problem_lang_tcode":"Korean"},{"problem_id":"2892","problem_lang":"1","title":"DOSADAN","description":"<p>Mirko received a message from his friend Slavko. Slavko, being a world class cryptologist, likes to encrypt messages he sends to Mirko. This time, he decided to use One Time Pad encryption. OTP is impenetrable if used correctly, and Slavko knows this. He however, doesn&#39;t want Mirko to bang his head on an impossible task, so he sent a few hints along with his message.<\/p>\r\n\r\n<p>Mirko knows that Slavkos original plaintext contained only small letters of the English alphabet (&#39;a&#39; - &#39;z&#39;), full stop &#39;.&#39; and space &#39; &#39; (ASCII 32<sub>10<\/sub>). Also, he knows that Slavko used only digits &#39;0&#39; to &#39;9&#39; as his key. After much thought, he realized he can determine locations of all spaces and full stops in the plaintext. He now asked you to write a program that will do so automatically.<\/p>\r\n\r\n<p>From his previous dealings with Slavko, Mirko knows how OTP encryption works. Let&#39;s look at a simple example. Suppose you want to encode the string &quot;abc efg&quot; using &quot;0120123&quot; as key.<\/p>\r\n<table class=\"table table-bordered td-center th-center\">\r\n\t<tbody>\r\n\t\t<tr>\r\n\t\t\t<td>\r\n\t\t\t<pre>\r\nabc efg\r\n0120123<\/pre>\r\n\t\t\t<\/td>\r\n\t\t\t<td>\r\n\t\t\t<pre>\r\n61 62 63 20 65 66 67\r\n30 31 32 30 31 32 33<\/pre>\r\n\t\t\t<\/td>\r\n\t\t\t<td>\r\n\t\t\t<pre>\r\n51 53 51 10 54 54 54<\/pre>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n\t<tfoot>\r\n\t\t<tr>\r\n\t\t\t<th>Start<\/th>\r\n\t\t\t<th>ASCII hexadecimal<\/th>\r\n\t\t\t<th>excrypted message<\/th>\r\n\t\t<\/tr>\r\n\t<\/tfoot>\r\n<\/table>\r\n\r\n\r\n<p>First, you transform both the key and plaintext into hexadecimal numbers using ASCII encoding. Then you align them and preform XOR operation on each pair. The resulting sequence is the encrypted message.<\/p>\r\n","input":"<p>The first line of input contains one integer N (1 &le; N &le; 1000), number of characters in the encrypted message.<\/p>\r\n\r\n<p>Next line contains N integers, written in hexadecimal, larger than or equal to 0<sub>10<\/sub> and smaller than or equal to 127<sub>10<\/sub>, the encrypted message.<\/p>\r\n","output":"<p>The first and only line of output should contain N characters, each representing one character in the plaintext. If the i<sup>th<\/sup> character of plaintext is a letter, the i<sup>th<\/sup> character of output should be a dash &#39;-&#39;, if not, you should output a full stop &#39;.&#39;.<\/p>\r\n","hint":"","original":"1","html_title":"0","problem_lang_tcode":"English"}]

출처

Contest > Croatian Open Competition in Informatics > COCI 2009/2010 > Contest #6 3번

  • 문제를 번역한 사람: arine