시간 제한메모리 제한제출정답맞힌 사람정답 비율
1 초 128 MB115625414422.642%

문제

수아는 보물 지도를 얻었다. 보물 지도는 N × M 크기이고 1 × 1크기의 정사각형으로 나누어져 있다. 보물 지도의 각 칸은 바다이거나 섬의 일부이다. 그리고, 지도에는 보물과 부산의 해적선의 위치도 있다. 마지막으로 수아는 자신의 위치를 지도에 표시했다.

자 이제, 수아는 보물을 가지기 위한 경로를 정해야 한다. 경로는 현재 수아의 위치에서 시작해야 하고, 보물의 위치에서 끝나야 한다. 매번 수아가 이동할 때, 수아는 위, 아래, 오른쪽, 왼쪽 중의 한 방향으로 이동해야 하고, 섬으로 들어가면 안 된다. 하지만, 부산의 해적도 수아와 같은 방식으로 이동할 것이므로, 부산의 해적을 조심해야 한다. 매번 수아가 이동한 후에, 해적은 수아의 이동에 대해서 이동할지 멈춰있을지 결정할 수 있다. 수아의 움직임과 해적의 반응을 턴이라고 부르면, 매 턴이 지난 후에 다음과 같이 2가지 방법으로확인할 수 있다.

  • 만약 수아가 해적과 바라보고 있다면 (해적과 수직선, 수평선상에 수아가 있고, 오직 그 사이에 바다만 있을 때) 수아는 죽는다.
  • 만약, 수아가 아직 죽지 않았고, 보물 위치에 있다면, 수아는 보물은 얻은 것이다.

부산의 해적이 어떻게 움직이건 관계없이 수아가 죽지않고 보물을 얻을 수 있는 경로를 구하는 프로그램을 작성하시오. 

입력

첫째 줄에 N과 M이 주어진다. 둘째 줄부터 N개의 줄에 보물 지도가 주어진다. 각 줄은 M개의 문자로 구성되어 있는데, .은 바다이고, I는 섬이고, V는 해적의 위치이고, Y는 현재 수아의 위치이고, T는 보물의 위치이다. V, Y, T는 모두 한 번씩 등장한다. (1 ≤ N, M ≤ 700)

출력

첫째 줄에 수아가 보물을 얻을 수 있으면 YES를 출력하고, 그렇지 않으면 NO를 출력한다.

예제 입력 1

5 7
Y.....V
..I....
..IIIII
.......
...T...

예제 출력 1

YES

예제 입력 2

5 7
Y....V.
..I....
..IIIII
.......
...T...

예제 출력 2

NO

예제 입력 3

2 3
.YT
VII

예제 출력 3

NO

힌트

첫 번째 예제의 경우 아래 아래 아래 오른쪽 오른쪽 오른쪽 아래와 같이 움직이면 수아는 보물을 얻을 수 있다.

[{"problem_id":"2424","problem_lang":"0","title":"\ubd80\uc0b0\uc758 \ud574\uc801","description":"<p>\uc218\uc544\ub294 \ubcf4\ubb3c \uc9c0\ub3c4\ub97c \uc5bb\uc5c8\ub2e4. \ubcf4\ubb3c \uc9c0\ub3c4\ub294 N &times; M \ud06c\uae30\uc774\uace0 1 &times; 1\ud06c\uae30\uc758 \uc815\uc0ac\uac01\ud615\uc73c\ub85c \ub098\ub204\uc5b4\uc838 \uc788\ub2e4. \ubcf4\ubb3c \uc9c0\ub3c4\uc758 \uac01 \uce78\uc740 \ubc14\ub2e4\uc774\uac70\ub098 \uc12c\uc758 \uc77c\ubd80\uc774\ub2e4. \uadf8\ub9ac\uace0, \uc9c0\ub3c4\uc5d0\ub294 \ubcf4\ubb3c\uacfc \ubd80\uc0b0\uc758 \ud574\uc801\uc120\uc758 \uc704\uce58\ub3c4 \uc788\ub2e4. \ub9c8\uc9c0\ub9c9\uc73c\ub85c \uc218\uc544\ub294 \uc790\uc2e0\uc758 \uc704\uce58\ub97c \uc9c0\ub3c4\uc5d0 \ud45c\uc2dc\ud588\ub2e4.<\/p>\r\n\r\n<p>\uc790 \uc774\uc81c, \uc218\uc544\ub294 \ubcf4\ubb3c\uc744 \uac00\uc9c0\uae30 \uc704\ud55c \uacbd\ub85c\ub97c \uc815\ud574\uc57c \ud55c\ub2e4. \uacbd\ub85c\ub294 \ud604\uc7ac \uc218\uc544\uc758 \uc704\uce58\uc5d0\uc11c \uc2dc\uc791\ud574\uc57c \ud558\uace0, \ubcf4\ubb3c\uc758 \uc704\uce58\uc5d0\uc11c \ub05d\ub098\uc57c \ud55c\ub2e4. \ub9e4\ubc88 \uc218\uc544\uac00 \uc774\ub3d9\ud560 \ub54c, \uc218\uc544\ub294 \uc704, \uc544\ub798, \uc624\ub978\ucabd, \uc67c\ucabd \uc911\uc758 \ud55c \ubc29\ud5a5\uc73c\ub85c \uc774\ub3d9\ud574\uc57c \ud558\uace0, \uc12c\uc73c\ub85c \ub4e4\uc5b4\uac00\uba74 \uc548 \ub41c\ub2e4. \ud558\uc9c0\ub9cc, \ubd80\uc0b0\uc758 \ud574\uc801\ub3c4 \uc218\uc544\uc640 \uac19\uc740 \ubc29\uc2dd\uc73c\ub85c \uc774\ub3d9\ud560 \uac83\uc774\ubbc0\ub85c, \ubd80\uc0b0\uc758 \ud574\uc801\uc744 \uc870\uc2ec\ud574\uc57c \ud55c\ub2e4. \ub9e4\ubc88 \uc218\uc544\uac00 \uc774\ub3d9\ud55c \ud6c4\uc5d0, \ud574\uc801\uc740 \uc218\uc544\uc758 \uc774\ub3d9\uc5d0 \ub300\ud574\uc11c \uc774\ub3d9\ud560\uc9c0 \uba48\ucdb0\uc788\uc744\uc9c0 \uacb0\uc815\ud560 \uc218 \uc788\ub2e4. \uc218\uc544\uc758 \uc6c0\uc9c1\uc784\uacfc \ud574\uc801\uc758 \ubc18\uc751\uc744 \ud134\uc774\ub77c\uace0 \ubd80\ub974\uba74, \ub9e4 \ud134\uc774 \uc9c0\ub09c \ud6c4\uc5d0 \ub2e4\uc74c\uacfc \uac19\uc774 2\uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c\ud655\uc778\ud560 \uc218 \uc788\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>\ub9cc\uc57d \uc218\uc544\uac00 \ud574\uc801\uacfc \ubc14\ub77c\ubcf4\uace0 \uc788\ub2e4\uba74 (\ud574\uc801\uacfc \uc218\uc9c1\uc120, \uc218\ud3c9\uc120\uc0c1\uc5d0 \uc218\uc544\uac00 \uc788\uace0, \uc624\uc9c1 \uadf8 \uc0ac\uc774\uc5d0 \ubc14\ub2e4\ub9cc \uc788\uc744 \ub54c) \uc218\uc544\ub294 \uc8fd\ub294\ub2e4.<\/li>\r\n\t<li>\ub9cc\uc57d, \uc218\uc544\uac00 \uc544\uc9c1 \uc8fd\uc9c0 \uc54a\uc558\uace0, \ubcf4\ubb3c \uc704\uce58\uc5d0 \uc788\ub2e4\uba74, \uc218\uc544\ub294 \ubcf4\ubb3c\uc740 \uc5bb\uc740 \uac83\uc774\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n<p>\ubd80\uc0b0\uc758 \ud574\uc801\uc774 \uc5b4\ub5bb\uac8c \uc6c0\uc9c1\uc774\uac74 \uad00\uacc4\uc5c6\uc774 \uc218\uc544\uac00 \uc8fd\uc9c0\uc54a\uace0 \ubcf4\ubb3c\uc744 \uc5bb\uc744 \uc218 \uc788\ub294 \uacbd\ub85c\ub97c \uad6c\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud558\uc2dc\uc624.&nbsp;<\/p>\r\n","input":"<p>\uccab\uc9f8 \uc904\uc5d0 N\uacfc M\uc774 \uc8fc\uc5b4\uc9c4\ub2e4. \ub458\uc9f8 \uc904\ubd80\ud130 N\uac1c\uc758 \uc904\uc5d0 \ubcf4\ubb3c \uc9c0\ub3c4\uac00 \uc8fc\uc5b4\uc9c4\ub2e4. \uac01 \uc904\uc740 M\uac1c\uc758 \ubb38\uc790\ub85c \uad6c\uc131\ub418\uc5b4 \uc788\ub294\ub370, .\uc740 \ubc14\ub2e4\uc774\uace0, I\ub294 \uc12c\uc774\uace0, V\ub294 \ud574\uc801\uc758 \uc704\uce58\uc774\uace0, Y\ub294 \ud604\uc7ac \uc218\uc544\uc758 \uc704\uce58\uc774\uace0, T\ub294 \ubcf4\ubb3c\uc758 \uc704\uce58\uc774\ub2e4. V, Y, T\ub294 \ubaa8\ub450 \ud55c \ubc88\uc529 \ub4f1\uc7a5\ud55c\ub2e4. (1 &le; N, M &le; 700)<\/p>\r\n","output":"<p>\uccab\uc9f8 \uc904\uc5d0 \uc218\uc544\uac00 \ubcf4\ubb3c\uc744 \uc5bb\uc744 \uc218 \uc788\uc73c\uba74 YES\ub97c \ucd9c\ub825\ud558\uace0, \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 NO\ub97c \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"<p>\uccab \ubc88\uc9f8 \uc608\uc81c\uc758 \uacbd\uc6b0 \uc544\ub798 \uc544\ub798 \uc544\ub798 \uc624\ub978\ucabd \uc624\ub978\ucabd \uc624\ub978\ucabd \uc544\ub798\uc640 \uac19\uc774 \uc6c0\uc9c1\uc774\uba74 \uc218\uc544\ub294 \ubcf4\ubb3c\uc744 \uc5bb\uc744 \uc218 \uc788\ub2e4.<\/p>\r\n","original":"0","html_title":"0","problem_lang_tcode":"Korean"},{"problem_id":"2424","problem_lang":"1","title":"Treasures and Vikings","description":"<p>You have a treasure map that is arranged into a N &times; M grid. A grid square may be either sea or part of an island. In addition, the map shows the treasure and an enemy Viking ship that occupies one (sea) square. Finally, for convenience you have also drawn your own position.<\/p>\r\n\r\n<p>Now you must set up a \ufb01xed route to get the treasure. The route must start at your position, end at the treasure, and consist of a sequence of moves. In each move, you can go only to an (horizontally or vertically) adjacent square that is not part of an island. But beware: The Viking ship might follow you, using the same kind of moves! After each of your moves according to your route, the Viking ship may move or not. Your move and the Vikings&rsquo; reaction together is called a round.<\/p>\r\n\r\n<p>After every round, the following checks are made:<\/p>\r\n\r\n<ul>\r\n\t<li>If you are in line with the Viking ship (you are in the same vertical or horizontal line as the Viking ship with only sea between the Viking ship and you), you are dead.<\/li>\r\n\t<li>If you aren&rsquo;t dead and at the treasure-spot, you get the treasure.<\/li>\r\n<\/ul>\r\n\r\n<p>Write a program that decides whether it is possible to set up a \ufb01xed route in advance such that you can get the treasure by following this route and will not get killed by the Vikings &ndash; no matter how the Viking ship moves.<\/p>\r\n","input":"<p>The \ufb01rst line of input contains two integers N and M, the dimensions of the map. Each of the following N lines contain M characters. Each character describes a square in the map, and is either . (sea), I (part of an island), V (the Viking ship), Y (your position), or T (the treasure). Each of V, Y, and T will occur exactly once.<\/p>\r\n","output":"<p>The only line of the output must contain the string YES, if it is possible to set up a route to get the treasure, or NO otherwise.<\/p>\r\n","hint":"<p>In the first example, the following route will let you get the treasure: Down, Down, Down, Right, Right, Right, Down.<\/p>\r\n\r\n<p>In the second and third examples, there is no route to the treasure that you will survive.<\/p>\r\n","original":"1","html_title":"0","problem_lang_tcode":"English","limit":"<ul>\r\n\t<li>1 &le; N, M &le; 700<\/li>\r\n<\/ul>\r\n"}]

출처

Olympiad > Baltic Olympiad in Informatics > BOI 2011 4번

  • 문제를 번역한 사람: baekjoon
  • 문제의 오타를 찾은 사람: jh05013