시간 제한 메모리 제한 제출 정답 맞은 사람 정답 비율
1 초 128 MB 305 28 22 13.750%

문제

승혁이는 과외의 제왕이다. 그래서 너무 입소문을 탄 나머지 최대 1,000명의 악동들을 동시에 가르치게 되고 말았다. 이 악동들은 너무나도 사악해서 승혁이는 도저히 제어할 수 없었고 결국 집을 탈출하기로 한다.

악동들은 승혁이의 시야에 있을 때는 그 자리에 가만히 있다가, 시야를 벗어나는 순간 빛의 속도로 달려와 승혁이의 뒤통수를 강하게 때린다. 빛의 속도이기 때문에 승혁이는 절대 이를 방어하거나 회피할 수 없다. 대신 승혁이의 시야는 전방 180도이며, 시력도 좋아서 시야의 모든 것을 완벽하게 볼 수 있다. 또한 승혁이는 시야를 전환하면서 움직일 수 있으며, 뒷걸음질도 가능하다.

이 집의 탈출구 또한 사악하게도 단 한 군데이다. 이제 승혁이는 모든 악동들을 시야에서 벗어나지 않게 하면서, 즉 한 대도 맞지 않고 탈출구까지 다다라야 한다. 이것이 가능한지 판별하고, 가능하다면 이동해야 하는 최소 거리를 구하시오. 왜냐면 승혁이는 정신이 어지러워서 최대한 빨리 이곳을 벗어나야만 하기 때문이다.

입력

첫째 줄에는 테스트 케이스의 개수가 주어지며, 테스트 케이스의 개수는 100개를 넘지 않는다. 각 테스트 케이스는 다음과 같이 이루어져 있다.

  • 첫째 줄에 승혁이의 시작 위치 xL과 yL이 주어진다.
  • 둘째 줄에 탈출구의 위치 xE와 yE가 주어진다.
  • 셋째 줄에 악동의 수 n이 주어진다. (1 ≤ n ≤ 1,000)
  • 이어서 n개의 줄에 각 악동들의 위치 xi와 yi가 주어진다.

모든 x, y 값은 정수이며 −10,000 ≤ x, y ≤ 10,000을 만족한다. 또한 승혁이, 탈출구, 악동들 전체를 비롯하여 중복되는 위치는 주어지지 않는다.

출력

각 테스트 케이스마다 한 줄에 걸쳐 정답을 출력한다.

  • 한 대도 안 맞고 탈출하는 것이 가능할 경우, 이동해야 할 최소 거리를 소수점 셋째 자리까지 반올림하여 출력하시오.
  • 만약 그것이 불가능하다면 "IMPOSSIBLE"을 출력하시오.

최종 답에 10-6 이내의 절대 오차가 나도 반올림 결과가 달라지지 않음이 보장된다.

예제 입력 1

2
0 0
2 0
2
1 1
1 -2
0 0
2 0
3
1 1
1 -2
-1 0

예제 출력 1

2.828
IMPOSSIBLE
[{"problem_id":"5377","problem_lang":"0","title":"\uc2b9\ud601\uc774\uc758 \uacfc\uc678\ub3cc\uc774\ub124 \uc9d1 \ud0c8\ucd9c\ud558\uae30","description":"<p>\uc2b9\ud601\uc774\ub294 \uacfc\uc678\uc758 \uc81c\uc655\uc774\ub2e4. \uadf8\ub798\uc11c \ub108\ubb34 \uc785\uc18c\ubb38\uc744 \ud0c4 \ub098\uba38\uc9c0 \ucd5c\ub300 1,000\uba85\uc758 \uc545\ub3d9\ub4e4\uc744 \ub3d9\uc2dc\uc5d0 \uac00\ub974\uce58\uac8c \ub418\uace0 \ub9d0\uc558\ub2e4. \uc774 \uc545\ub3d9\ub4e4\uc740 \ub108\ubb34\ub098\ub3c4 \uc0ac\uc545\ud574\uc11c \uc2b9\ud601\uc774\ub294 \ub3c4\uc800\ud788 \uc81c\uc5b4\ud560 \uc218 \uc5c6\uc5c8\uace0 \uacb0\uad6d \uc9d1\uc744 \ud0c8\ucd9c\ud558\uae30\ub85c \ud55c\ub2e4.<\/p>\r\n\r\n<p>\uc545\ub3d9\ub4e4\uc740 \uc2b9\ud601\uc774\uc758 \uc2dc\uc57c\uc5d0 \uc788\uc744 \ub54c\ub294 \uadf8 \uc790\ub9ac\uc5d0 \uac00\ub9cc\ud788 \uc788\ub2e4\uac00, \uc2dc\uc57c\ub97c \ubc97\uc5b4\ub098\ub294 \uc21c\uac04 \ube5b\uc758 \uc18d\ub3c4\ub85c \ub2ec\ub824\uc640 \uc2b9\ud601\uc774\uc758 \ub4a4\ud1b5\uc218\ub97c \uac15\ud558\uac8c \ub54c\ub9b0\ub2e4. \ube5b\uc758 \uc18d\ub3c4\uc774\uae30 \ub54c\ubb38\uc5d0 \uc2b9\ud601\uc774\ub294 \uc808\ub300 \uc774\ub97c \ubc29\uc5b4\ud558\uac70\ub098 \ud68c\ud53c\ud560 \uc218 \uc5c6\ub2e4. \ub300\uc2e0 \uc2b9\ud601\uc774\uc758 \uc2dc\uc57c\ub294 \uc804\ubc29 180\ub3c4\uc774\uba70, \uc2dc\ub825\ub3c4 \uc88b\uc544\uc11c \uc2dc\uc57c\uc758 \ubaa8\ub4e0 \uac83\uc744 \uc644\ubcbd\ud558\uac8c \ubcfc \uc218 \uc788\ub2e4. \ub610\ud55c \uc2b9\ud601\uc774\ub294 \uc2dc\uc57c\ub97c \uc804\ud658\ud558\uba74\uc11c \uc6c0\uc9c1\uc77c \uc218 \uc788\uc73c\uba70, \ub4b7\uac78\uc74c\uc9c8\ub3c4 \uac00\ub2a5\ud558\ub2e4.<\/p>\r\n\r\n<p>\uc774 \uc9d1\uc758 \ud0c8\ucd9c\uad6c \ub610\ud55c \uc0ac\uc545\ud558\uac8c\ub3c4 \ub2e8 \ud55c \uad70\ub370\uc774\ub2e4. \uc774\uc81c \uc2b9\ud601\uc774\ub294 \ubaa8\ub4e0 \uc545\ub3d9\ub4e4\uc744 \uc2dc\uc57c\uc5d0\uc11c \ubc97\uc5b4\ub098\uc9c0 \uc54a\uac8c \ud558\uba74\uc11c, \uc989 \ud55c \ub300\ub3c4 \ub9de\uc9c0 \uc54a\uace0 \ud0c8\ucd9c\uad6c\uae4c\uc9c0 \ub2e4\ub2e4\ub77c\uc57c \ud55c\ub2e4. \uc774\uac83\uc774 \uac00\ub2a5\ud55c\uc9c0 \ud310\ubcc4\ud558\uace0, \uac00\ub2a5\ud558\ub2e4\uba74 \uc774\ub3d9\ud574\uc57c \ud558\ub294 \ucd5c\uc18c \uac70\ub9ac\ub97c \uad6c\ud558\uc2dc\uc624. \uc65c\ub0d0\uba74 \uc2b9\ud601\uc774\ub294 \uc815\uc2e0\uc774 \uc5b4\uc9c0\ub7ec\uc6cc\uc11c \ucd5c\ub300\ud55c \ube68\ub9ac \uc774\uacf3\uc744 \ubc97\uc5b4\ub098\uc57c\ub9cc \ud558\uae30 \ub54c\ubb38\uc774\ub2e4.<\/p>\r\n","input":"<p>\uccab\uc9f8 \uc904\uc5d0\ub294 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc758 \uac1c\uc218\uac00 \uc8fc\uc5b4\uc9c0\uba70, \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc758 \uac1c\uc218\ub294 100\uac1c\ub97c \ub118\uc9c0 \uc54a\ub294\ub2e4. \uac01 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc774\ub8e8\uc5b4\uc838 \uc788\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>\uccab\uc9f8 \uc904\uc5d0 \uc2b9\ud601\uc774\uc758 \uc2dc\uc791 \uc704\uce58&nbsp;x<sub>L<\/sub>\uacfc y<sub>L<\/sub>\uc774 \uc8fc\uc5b4\uc9c4\ub2e4.<\/li>\r\n\t<li>\ub458\uc9f8 \uc904\uc5d0 \ud0c8\ucd9c\uad6c\uc758 \uc704\uce58 x<sub>E<\/sub>\uc640 y<sub>E<\/sub>\uac00 \uc8fc\uc5b4\uc9c4\ub2e4.<\/li>\r\n\t<li>\uc14b\uc9f8 \uc904\uc5d0 \uc545\ub3d9\uc758 \uc218 n\uc774 \uc8fc\uc5b4\uc9c4\ub2e4. (1&nbsp;&le; n &le; 1,000)<\/li>\r\n\t<li>\uc774\uc5b4\uc11c n\uac1c\uc758 \uc904\uc5d0 \uac01&nbsp;\uc545\ub3d9\ub4e4\uc758 \uc704\uce58 x<sub>i<\/sub>\uc640 y<sub>i<\/sub>\uac00 \uc8fc\uc5b4\uc9c4\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n<p>\ubaa8\ub4e0 x, y \uac12\uc740 \uc815\uc218\uc774\uba70&nbsp;&minus;10,000 &le; x, y &le; 10,000\uc744 \ub9cc\uc871\ud55c\ub2e4. \ub610\ud55c \uc2b9\ud601\uc774, \ud0c8\ucd9c\uad6c, \uc545\ub3d9\ub4e4 \uc804\uccb4\ub97c \ube44\ub86f\ud558\uc5ec \uc911\ubcf5\ub418\ub294 \uc704\uce58\ub294 \uc8fc\uc5b4\uc9c0\uc9c0 \uc54a\ub294\ub2e4.<\/p>\r\n","output":"<p>\uac01 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\ub9c8\ub2e4 \ud55c \uc904\uc5d0 \uac78\uccd0 \uc815\ub2f5\uc744 \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>\ud55c \ub300\ub3c4 \uc548 \ub9de\uace0 \ud0c8\ucd9c\ud558\ub294 \uac83\uc774 \uac00\ub2a5\ud560 \uacbd\uc6b0, \uc774\ub3d9\ud574\uc57c \ud560 \ucd5c\uc18c \uac70\ub9ac\ub97c \uc18c\uc218\uc810 \uc14b\uc9f8 \uc790\ub9ac\uae4c\uc9c0 \ubc18\uc62c\ub9bc\ud558\uc5ec \ucd9c\ub825\ud558\uc2dc\uc624.<\/li>\r\n\t<li>\ub9cc\uc57d \uadf8\uac83\uc774 \ubd88\uac00\ub2a5\ud558\ub2e4\uba74 &quot;IMPOSSIBLE&quot;\uc744 \ucd9c\ub825\ud558\uc2dc\uc624.<\/li>\r\n<\/ul>\r\n\r\n<p>\ucd5c\uc885 \ub2f5\uc5d0 10<sup>-6<\/sup> \uc774\ub0b4\uc758 \uc808\ub300 \uc624\ucc28\uac00 \ub098\ub3c4 \ubc18\uc62c\ub9bc \uacb0\uacfc\uac00 \ub2ec\ub77c\uc9c0\uc9c0 \uc54a\uc74c\uc774 \ubcf4\uc7a5\ub41c\ub2e4.<\/p>\r\n","hint":"","original":"0","problem_lang_code":"\ud55c\uad6d\uc5b4"},{"problem_id":"5377","problem_lang":"1","title":"Gunslinger","description":"<p>The quickly shooting, maiden saving, gunslinging cowboy Luke finds himself in the den of his archenemy: the Dalton gang. He is trying to escape but is in constant danger of being shot. Fortunately his excellent marksmanship and quick reflexes give him the upper hand in a firefight: the gang members are all too scared to move, let alone draw their guns. That is, as long as Luke can see them. If he cannot see one of the thugs, then that Dalton will immediately fire upon Luke and kill the cowboy without fear of retaliation. Luke&rsquo;s amazing eyesight allows him to cover a field of view of 180 degrees all the time. While doing so he can move around freely, even walking backward if necessary.<\/p>\r\n\r\n<p>Luke&rsquo;s goal is to walk to the escape hatch in the den while turning in such a way that he will not be shot. He does not want to shoot any of the Daltons because that will surely result in a big fire fight. The Daltons all have varying heights, but you may assume that all the people and the hatch are of infinitesimal size.<\/p>\r\n","input":"<p>On the first line one positive number: the number of test cases, at most 100. After that per test case:<\/p>\r\n\r\n<ul>\r\n\t<li>one line with two space-separated integers x<sub>L<\/sub> and y<sub>L<\/sub>: Luke&rsquo;s starting position.<\/li>\r\n\t<li>one line with two space-separated integers x<sub>E<\/sub> and y<sub>E<\/sub>: the position of the escape hatch.<\/li>\r\n\t<li>one line with an integer n (1 &le; n &le; 1 000): the number of Dalton gang members.<\/li>\r\n\t<li>n lines with two space-separated integers x<sub>i<\/sub> and y<sub>i<\/sub>: the position of the i-th Dalton.<\/li>\r\n<\/ul>\r\n\r\n<p>All x and y are in the range &minus;10 000 &le; x, y &le; 10 000. Luke, the escape hatch and all Daltons all have distinct positions.<\/p>\r\n","output":"<p>Per test case:<\/p>\r\n\r\n<ul>\r\n\t<li>one line with the length of the shortest path Luke can take to the escape hatch without dying, rounded to three decimal places, or &ldquo;IMPOSSIBLE&rdquo; if no such path exists.<\/li>\r\n<\/ul>\r\n\r\n<p>The test cases are such that an absolute error of at most 10<sup>-6<\/sup> in the final answer does not influence the result of the rounding.<\/p>\r\n","hint":"","original":"1","problem_lang_code":"\uc601\uc5b4"}]

출처

ACM-ICPC > Regionals > Europe > Northwestern European Regional Contest > Benelux Algorithm Programming Contest > BAPC 2012 Preliminaries G번

  • 문제의 오타를 찾은 사람: jh05013
  • 문제를 번역한 사람: kks227
  • 데이터를 추가한 사람: podracer