시간 제한 메모리 제한 제출 정답 맞은 사람 정답 비율
5 초 128 MB 7 0 0 0.000%

문제

상근이는 정인이와 체스를 두려고 한다. 그런데 흰색 킹을 잃어버린 바람에, 상근이와 정인이는 자신들만의 형태의 체스를 하기로 했다. 상근이에게는 룩(♖) 두 개(여기서 룩은 가로, 세로로 움직일 수 있다)가 있고, 정인이에게는 왕(♚)만 남아 있다. 지금은 상근이의 차례이다. 상근이는 체크메이트를 만들어 정인이를 이기려고 한다. 정인이가 가장 나은 수를 둘 때, 상근이가 이기는 데 걸리는 최소 횟수를 구하는 프로그램을 작성하여라.

 다음을 참고하시오.

  1. 위에서 설명된 상황은 실제 체스에서는 불가능하다. 대신 이것을 제외한 나머지 모든 상황은 체스의 규칙에 따른다.
  2. 체스판은 8 x 8 사이즈로, 가로줄은 1~8로 나타내고, 세로줄 번호는 a~h로 나타낸다.
  3. 이 프로그램에서는 상근이(백)의 말 움직임 횟수만 센다.
  4. 룩은 앞서 말했듯이 가로와 세로로 움직일 수 있다. 하지만 다른 룩을 넘어갈 수는 없다.
  5. 체크는 왕을 잡을 수 있는 위치로 백 룩이 움직이는 것을 말한다.
  6. 킹은 어느 방향이로든지 한 칸씩만 움직일 수 있지만, 킹이 움직이면 죽는 자리로는 갈 수 없다.
  7. 체크메이트는 왕이 어느 곳으로 가든 백 룩에 의해 죽을 수밖에 없는 상황을 말한다.
  8. 이 밖에도 스테일메이트라는 상황이 있는데, 스테일메이트는 왕이 체크를 당한 상황은 아니지만, 어떤 경우에라도 움직이게 되면 체크를 불리어 말을 움직일 수 없는 경우를 나타낸다. 이 경우에는 무승부가 된다.

입력

입력의 첫 줄에는 테스트 케이스가 주어진다.

각 테스트 케이스의 입력은 한 줄로 이루어져 있고, 각각 정인이의 킹의 위치와 상근이의 두 룩의 위치로 이루어져 있다. 같은 위치에 있는 두 말은 존재하지 않는다. 또한, 입력에서 들어오는 상황은 흑 킹이 처음부터 체크를 불리우는 상황이 아니다.

출력

상근이가 이기기 위한 최소 움직인 횟수를 출력한다. 상근이가 이길 수 없는 경우에는 0을 출력한다.

예제 입력 1

2
c7 f1 g6
h6 c3 g8

예제 출력 1

2
1
[{"problem_id":"9266","problem_lang":"0","title":"\uccb4\uc2a4 \uac8c\uc784","description":"<p>\uc0c1\uadfc\uc774\ub294 \uc815\uc778\uc774\uc640 \uccb4\uc2a4\ub97c \ub450\ub824\uace0 \ud55c\ub2e4. \uadf8\ub7f0\ub370 \ud770\uc0c9 \ud0b9\uc744 \uc783\uc5b4\ubc84\ub9b0 \ubc14\ub78c\uc5d0, \uc0c1\uadfc\uc774\uc640 \uc815\uc778\uc774\ub294 \uc790\uc2e0\ub4e4\ub9cc\uc758 \ud615\ud0dc\uc758 \uccb4\uc2a4\ub97c \ud558\uae30\ub85c \ud588\ub2e4. \uc0c1\uadfc\uc774\uc5d0\uac8c\ub294 \ub8e9(\u2656) \ub450 \uac1c(\uc5ec\uae30\uc11c \ub8e9\uc740 \uac00\ub85c, \uc138\ub85c\ub85c \uc6c0\uc9c1\uc77c \uc218 \uc788\ub2e4)\uac00 \uc788\uace0, \uc815\uc778\uc774\uc5d0\uac8c\ub294 \uc655(\u265a)\ub9cc \ub0a8\uc544 \uc788\ub2e4. \uc9c0\uae08\uc740 \uc0c1\uadfc\uc774\uc758 \ucc28\ub840\uc774\ub2e4. \uc0c1\uadfc\uc774\ub294 \uccb4\ud06c\uba54\uc774\ud2b8\ub97c \ub9cc\ub4e4\uc5b4 \uc815\uc778\uc774\ub97c \uc774\uae30\ub824\uace0 \ud55c\ub2e4. \uc815\uc778\uc774\uac00 \uac00\uc7a5 \ub098\uc740 \uc218\ub97c \ub458 \ub54c, \uc0c1\uadfc\uc774\uac00 \uc774\uae30\ub294 \ub370 \uac78\ub9ac\ub294 \ucd5c\uc18c \ud69f\uc218\ub97c \uad6c\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud558\uc5ec\ub77c.<\/p>\r\n\r\n<p>&nbsp;\ub2e4\uc74c\uc744 \ucc38\uace0\ud558\uc2dc\uc624.<\/p>\r\n\r\n<ol>\r\n\t<li>\uc704\uc5d0\uc11c \uc124\uba85\ub41c \uc0c1\ud669\uc740 \uc2e4\uc81c \uccb4\uc2a4\uc5d0\uc11c\ub294 \ubd88\uac00\ub2a5\ud558\ub2e4. \ub300\uc2e0 \uc774\uac83\uc744 \uc81c\uc678\ud55c \ub098\uba38\uc9c0 \ubaa8\ub4e0 \uc0c1\ud669\uc740 \uccb4\uc2a4\uc758 \uaddc\uce59\uc5d0 \ub530\ub978\ub2e4.<\/li>\r\n\t<li>\uccb4\uc2a4\ud310\uc740 8&nbsp;x&nbsp;8 \uc0ac\uc774\uc988\ub85c, \uac00\ub85c\uc904\uc740&nbsp;1~8\ub85c \ub098\ud0c0\ub0b4\uace0, \uc138\ub85c\uc904 \ubc88\ud638\ub294 a~h\ub85c \ub098\ud0c0\ub0b8\ub2e4.<\/li>\r\n\t<li>\uc774 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c\ub294 \uc0c1\uadfc\uc774(\ubc31)\uc758 \ub9d0 \uc6c0\uc9c1\uc784 \ud69f\uc218\ub9cc \uc13c\ub2e4.<\/li>\r\n\t<li>\ub8e9\uc740 \uc55e\uc11c \ub9d0\ud588\ub4ef\uc774 \uac00\ub85c\uc640 \uc138\ub85c\ub85c \uc6c0\uc9c1\uc77c \uc218 \uc788\ub2e4. \ud558\uc9c0\ub9cc \ub2e4\ub978 \ub8e9\uc744 \ub118\uc5b4\uac08 \uc218\ub294 \uc5c6\ub2e4.<\/li>\r\n\t<li>\uccb4\ud06c\ub294 \uc655\uc744 \uc7a1\uc744 \uc218 \uc788\ub294 \uc704\uce58\ub85c \ubc31 \ub8e9\uc774 \uc6c0\uc9c1\uc774\ub294 \uac83\uc744 \ub9d0\ud55c\ub2e4.<\/li>\r\n\t<li>\ud0b9\uc740 \uc5b4\ub290 \ubc29\ud5a5\uc774\ub85c\ub4e0\uc9c0 \ud55c \uce78\uc529\ub9cc \uc6c0\uc9c1\uc77c \uc218 \uc788\uc9c0\ub9cc, \ud0b9\uc774 \uc6c0\uc9c1\uc774\uba74 \uc8fd\ub294 \uc790\ub9ac\ub85c\ub294 \uac08 \uc218 \uc5c6\ub2e4.<\/li>\r\n\t<li>\uccb4\ud06c\uba54\uc774\ud2b8\ub294 \uc655\uc774 \uc5b4\ub290 \uacf3\uc73c\ub85c \uac00\ub4e0 \ubc31 \ub8e9\uc5d0 \uc758\ud574 \uc8fd\uc744 \uc218\ubc16\uc5d0 \uc5c6\ub294 \uc0c1\ud669\uc744 \ub9d0\ud55c\ub2e4.<\/li>\r\n\t<li>\uc774 \ubc16\uc5d0\ub3c4 \uc2a4\ud14c\uc77c\uba54\uc774\ud2b8\ub77c\ub294 \uc0c1\ud669\uc774 \uc788\ub294\ub370, \uc2a4\ud14c\uc77c\uba54\uc774\ud2b8\ub294 \uc655\uc774 \uccb4\ud06c\ub97c \ub2f9\ud55c \uc0c1\ud669\uc740 \uc544\ub2c8\uc9c0\ub9cc, \uc5b4\ub5a4 \uacbd\uc6b0\uc5d0\ub77c\ub3c4 \uc6c0\uc9c1\uc774\uac8c \ub418\uba74 \uccb4\ud06c\ub97c \ubd88\ub9ac\uc5b4 \ub9d0\uc744 \uc6c0\uc9c1\uc77c \uc218 \uc5c6\ub294 \uacbd\uc6b0\ub97c \ub098\ud0c0\ub0b8\ub2e4. \uc774 \uacbd\uc6b0\uc5d0\ub294 \ubb34\uc2b9\ubd80\uac00 \ub41c\ub2e4.<\/li>\r\n<\/ol>\r\n","input":"<p>\uc785\ub825\uc758 \uccab \uc904\uc5d0\ub294 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uac00 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\uac01 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc758 \uc785\ub825\uc740 \ud55c \uc904\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uace0, \uac01\uac01 \uc815\uc778\uc774\uc758 \ud0b9\uc758 \uc704\uce58\uc640 \uc0c1\uadfc\uc774\uc758 \ub450 \ub8e9\uc758 \uc704\uce58\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\ub2e4. \uac19\uc740 \uc704\uce58\uc5d0 \uc788\ub294 \ub450 \ub9d0\uc740 \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294\ub2e4. \ub610\ud55c, \uc785\ub825\uc5d0\uc11c \ub4e4\uc5b4\uc624\ub294 \uc0c1\ud669\uc740 \ud751 \ud0b9\uc774 \ucc98\uc74c\ubd80\ud130 \uccb4\ud06c\ub97c \ubd88\ub9ac\uc6b0\ub294 \uc0c1\ud669\uc774 \uc544\ub2c8\ub2e4.<\/p>\r\n","output":"<p>\uc0c1\uadfc\uc774\uac00 \uc774\uae30\uae30 \uc704\ud55c \ucd5c\uc18c \uc6c0\uc9c1\uc778 \ud69f\uc218\ub97c \ucd9c\ub825\ud55c\ub2e4. \uc0c1\uadfc\uc774\uac00 \uc774\uae38 \uc218 \uc5c6\ub294 \uacbd\uc6b0\uc5d0\ub294 0\uc744 \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"","original":"0","problem_lang_code":"\ud55c\uad6d\uc5b4"},{"problem_id":"9266","problem_lang":"1","title":"Chess","description":"<p>There are two white rooks (\u2656) and one black king (\u265a) on a chess board. White starts. You&rsquo;re playing for White and need to checkmate the black king as soon as possible. Write a program that will determine the minimum number of moves White needs to perform to checkmate black king, assuming Black follows the best possible strategy for prolonging the game.<\/p>\r\n\r\n<p>Some information about the chess rules:<\/p>\r\n\r\n<ol>\r\n\t<li>The position described above is not legal in chess since there is no white king on the board. Apart from that the game is according to the chess rules.<\/li>\r\n\t<li>The board size is 8&times;8 cells. Columns of the board are labeled by the letters a to h, and the rows by the digits 1 to 8.<\/li>\r\n\t<li>The players (White and Black) alternately move one piece of their own color at a time. In the context of this problem we&rsquo;re only counting moves made by White.<\/li>\r\n\t<li>The rook moves horizontally or vertically, through any number of unoccupied squares. It cannot jump over or stay in the same cell as another piece of the same color, namely the other white rook.<\/li>\r\n\t<li>A check is a threat to capture the king on the next move turn, i.e. a position in which one of the rooks is on the same line as the king.<\/li>\r\n\t<li>A king can move one square in any direction (horizontally, vertically, or diagonally) unless the move would place the king in check. If this condition holds, it&rsquo;s not prohibited for king to take over a cell already occupied by one of the rooks. In this case the rook is removed from play altogether.&nbsp;<\/li>\r\n\t<li>Checkmate is a position in which a king is threatened with capture (i.e. is in check) and there is no legal move to escape the threat.<\/li>\r\n\t<li>Stalemate is a situation where the player whose turn it is to move is not in check but has no legal move. The rules of chess provide that when stalemate occurs, the game ends as a draw (which is not acceptable for White).<\/li>\r\n<\/ol>\r\n","input":"<p>The first line of the input contains the number of positions (which is at least 1), and each of the following lines contain the description of a single position. All positions in the input are different.<\/p>\r\n\r\n<p>A position is represented by the location of the three pieces on the board: the black king first and then the two white rooks. It&rsquo;s guaranteed that no two pieces share a cell and there is no check at the initial position.&nbsp;<\/p>\r\n","output":"<p>Output one line for each position in the input. The line should contain the minimum number of moves which White needs to make to guarantee the checkmate, starting from the corresponding position. In case it&rsquo;s not possible to reach the goal, output 0 for relevant position.<\/p>\r\n","hint":"","original":"1","problem_lang_code":"\uc601\uc5b4"}]

출처

ACM-ICPC > Regionals > Europe > Southeastern European Regional Contest > SEERC 2013 D번