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문제

안녕! 난 몽키 D. 루피라고 해! 해적왕이 될 남자지! 우리는 며칠 전에 드디어 전설의 보물 원피스가 숨겨진 섬을 표시해 둔 보물지도를 손에 넣었어! 원피스가 뭐냐고? 에이 참, 그것도 모르다니... 전설의 해적왕 골 D. 로저가 숨겨놓은 보물이라구! 여튼, 이 보물지도를 보고 우리는 그 섬이 어딘지 찾아가야 해!

보물섬이 위치해 있는 해안은 아주 작은 섬들이 굉장히 많이 있다고 들었어. 그래서 섬을 하나하나 뒤져보는 건 너무 오래 걸린다구! 그런데 이 보물지도 좀 이상해. 보통 생각하는 조감 시점의 보물지도가 아니라, 보물섬의 정상에서 바닷가를 바라보았을 때 어떤 섬들이 보이는지만 그려놓았어. 이건 워낙에 그 바다가 위험천만하고 재해가 많이 일어나서였나 봐.

예를 들면 왼쪽 그림이 실제 섬들의 위치이고, 오른쪽이 보물지도야. 보물지도에서 왼쪽에 그려진 섬은 실제로도 보물섬의 정상에서 바라보았을 때 왼쪽에 있다는 뜻이야. 그런데 그림을 그린 사람이 실력이 형편없었는지 두 섬이 떨어진 거리는 실제 보는 것과 차이가 심하다고 해. 게다가 이 해안이 안개까지 짙어서 실제로 안개에 가려서 보이지 않은 섬들은 그려지지도 않았어. 다행히 시력은 좋아서 180도 전방을 다 그려냈고, 섬마다 정확한 표식을 해 놓아서 그 섬이 어떤 섬인지는 확실히 알 수 있어.

만약 보물섬이 Rummet이었다고 치자면, Rummet에서 동쪽을 바라보았을 때 첫 번째 보물지도처럼 왼쪽부터 Wisket, Ginnet, Vinnet 섬 순으로 보일 것이고, 아니면 Liquorel, Cidrel 섬들이 보일 수도 있어. 아까 말했듯이 안개 때문에 몇몇 섬들이 그려지지 않은데다가, 실제로 볼 때 이 섬들 사이의 거리와 지도상에 그려진 거리는 아주 다르고 들쑥날쑥하지?

하지만 우리는 이제 보물지도뿐 아니라 그 해안에 어떤 섬이 있는지를 아주 정확히 나타내는 조감 시점의 지도도 찾았어! 이 지도들을 갖고 보물섬이 어딘지 찾아내서 기필코 해적왕이 되고 말 거야! 보물섬을 찾아낼 수 있겠어?

입력

첫 번째 줄에는 테스트 케이스의 개수가 주어져. 각 테스트 케이스는 다음과 같은 형식으로 이루어져 있어.

  • 첫 번째 줄에 섬의 개수를 나타내는 정수 n이 주어져. (1 ≤ n ≤ 125,000)
  • 이어서 N개의 줄에 각 섬의 좌표가 정수 xi와 yi가 주어져. (0 < xi, yi < 229) i+1번째 줄은 섬 Ti의 좌표야.
  • 이어서 하나의 줄에, 이 바다에서 해결해야 할 문제 개수 k가 주어져. 각 문제는 다음과 같은 형식으로 이루어져 있어.
    • 첫 번째 줄에 정보의 개수 m이 주어져. (0 ≤ m ≤ 10,000)
    • 이어서 m개의 줄에 두 정수 l, r이 주어져. (1 ≤ l, r ≤ n, l ≠ r) 이건 보물지도에서 섬 Tl이 섬 Tr보다 왼쪽에 그려졌다는 뜻이야.

어떤 바닷가든지, 동일한 x좌표를 가진 두 섬은 존재하지 않고, 동일한 y좌표를 가진 두 섬도 존재하지 않아. 그리고 어떠한 세 섬도 일직선상에 있지 않아.

출력

각 문제마다 다음과 같이 정답을 출력하면 돼.

보물섬일 가능성이 있는 섬들의 번호를 오름차순으로 한 줄에 하나씩 출력해.

마지막 줄에는 정수 0을 하나 출력해.

예제 입력 1

1
9
28 34
32 30
12 29
27 22
42 23
18 18
5 14
26 12
34 5
1
4
1 2
1 9
2 9
4 5

예제 출력 1

6
7
8
0

힌트

주어진 입력 예제는 문제 설명에서 보여준 지도를 나타낸 예제이다. 주어진 정보로 추측할 수 있는 보물섬들은 Rummet, Alet, Schnaphpsum이다.

[{"problem_id":"5383","problem_lang":"0","title":"\uc548\ub155! \ub09c \ub8e8\ud53c! \uc7a5\ub798\uc5d0 \ud574\uc801\uc655\uc774 \ub420 \uc0ac\ub0b4\ub2e4!","description":"<p>\uc548\ub155! \ub09c \ubabd\ud0a4 D. \ub8e8\ud53c\ub77c\uace0 \ud574! \ud574\uc801\uc655\uc774 \ub420 \ub0a8\uc790\uc9c0! \uc6b0\ub9ac\ub294 \uba70\uce60 \uc804\uc5d0 \ub4dc\ub514\uc5b4 \uc804\uc124\uc758 \ubcf4\ubb3c \uc6d0\ud53c\uc2a4\uac00 \uc228\uaca8\uc9c4 \uc12c\uc744 \ud45c\uc2dc\ud574 \ub454 \ubcf4\ubb3c\uc9c0\ub3c4\ub97c \uc190\uc5d0 \ub123\uc5c8\uc5b4! \uc6d0\ud53c\uc2a4\uac00 \ubb50\ub0d0\uace0? \uc5d0\uc774 \ucc38, \uadf8\uac83\ub3c4 \ubaa8\ub974\ub2e4\ub2c8... \uc804\uc124\uc758 \ud574\uc801\uc655 \uace8 D. \ub85c\uc800\uac00 \uc228\uaca8\ub193\uc740 \ubcf4\ubb3c\uc774\ub77c\uad6c! \uc5ec\ud2bc, \uc774 \ubcf4\ubb3c\uc9c0\ub3c4\ub97c \ubcf4\uace0 \uc6b0\ub9ac\ub294 \uadf8 \uc12c\uc774 \uc5b4\ub518\uc9c0 \ucc3e\uc544\uac00\uc57c \ud574!<\/p>\r\n\r\n<p>\ubcf4\ubb3c\uc12c\uc774 \uc704\uce58\ud574 \uc788\ub294 \ud574\uc548\uc740 \uc544\uc8fc \uc791\uc740 \uc12c\ub4e4\uc774 \uad49\uc7a5\ud788 \ub9ce\uc774 \uc788\ub2e4\uace0 \ub4e4\uc5c8\uc5b4. \uadf8\ub798\uc11c \uc12c\uc744 \ud558\ub098\ud558\ub098 \ub4a4\uc838\ubcf4\ub294 \uac74 \ub108\ubb34 \uc624\ub798 \uac78\ub9b0\ub2e4\uad6c! \uadf8\ub7f0\ub370 \uc774 \ubcf4\ubb3c\uc9c0\ub3c4 \uc880 \uc774\uc0c1\ud574. \ubcf4\ud1b5 \uc0dd\uac01\ud558\ub294 \uc870\uac10 \uc2dc\uc810\uc758 \ubcf4\ubb3c\uc9c0\ub3c4\uac00 \uc544\ub2c8\ub77c, \ubcf4\ubb3c\uc12c\uc758 \uc815\uc0c1\uc5d0\uc11c \ubc14\ub2f7\uac00\ub97c \ubc14\ub77c\ubcf4\uc558\uc744 \ub54c \uc5b4\ub5a4 \uc12c\ub4e4\uc774 \ubcf4\uc774\ub294\uc9c0\ub9cc \uadf8\ub824\ub193\uc558\uc5b4. \uc774\uac74 \uc6cc\ub099\uc5d0 \uadf8 \ubc14\ub2e4\uac00 \uc704\ud5d8\ucc9c\ub9cc\ud558\uace0 \uc7ac\ud574\uac00 \ub9ce\uc774 \uc77c\uc5b4\ub098\uc11c\uc600\ub098&nbsp;\ubd10.<\/p>\r\n\r\n<p style=\"text-align:center\"><img alt=\"\" src=\"\/upload\/images2\/treasure.png\" style=\"height:266px; opacity:0.9; text-align:center; width:586px\" \/><\/p>\r\n\r\n<p>\uc608\ub97c \ub4e4\uba74 \uc67c\ucabd \uadf8\ub9bc\uc774 \uc2e4\uc81c \uc12c\ub4e4\uc758 \uc704\uce58\uc774\uace0, \uc624\ub978\ucabd\uc774 \ubcf4\ubb3c\uc9c0\ub3c4\uc57c. \ubcf4\ubb3c\uc9c0\ub3c4\uc5d0\uc11c \uc67c\ucabd\uc5d0 \uadf8\ub824\uc9c4 \uc12c\uc740 \uc2e4\uc81c\ub85c\ub3c4 \ubcf4\ubb3c\uc12c\uc758 \uc815\uc0c1\uc5d0\uc11c \ubc14\ub77c\ubcf4\uc558\uc744 \ub54c \uc67c\ucabd\uc5d0 \uc788\ub2e4\ub294 \ub73b\uc774\uc57c. \uadf8\ub7f0\ub370 \uadf8\ub9bc\uc744 \uadf8\ub9b0 \uc0ac\ub78c\uc774 \uc2e4\ub825\uc774 \ud615\ud3b8\uc5c6\uc5c8\ub294\uc9c0 \ub450 \uc12c\uc774 \ub5a8\uc5b4\uc9c4 \uac70\ub9ac\ub294 \uc2e4\uc81c \ubcf4\ub294 \uac83\uacfc \ucc28\uc774\uac00 \uc2ec\ud558\ub2e4\uace0 \ud574. \uac8c\ub2e4\uac00 \uc774 \ud574\uc548\uc774 \uc548\uac1c\uae4c\uc9c0 \uc9d9\uc5b4\uc11c \uc2e4\uc81c\ub85c \uc548\uac1c\uc5d0 \uac00\ub824\uc11c \ubcf4\uc774\uc9c0 \uc54a\uc740 \uc12c\ub4e4\uc740 \uadf8\ub824\uc9c0\uc9c0\ub3c4 \uc54a\uc558\uc5b4.&nbsp;\ub2e4\ud589\ud788 \uc2dc\ub825\uc740 \uc88b\uc544\uc11c 180\ub3c4 \uc804\ubc29\uc744 \ub2e4 \uadf8\ub824\ub0c8\uace0, \uc12c\ub9c8\ub2e4 \uc815\ud655\ud55c \ud45c\uc2dd\uc744 \ud574 \ub193\uc544\uc11c \uadf8 \uc12c\uc774&nbsp;\uc5b4\ub5a4 \uc12c\uc778\uc9c0\ub294 \ud655\uc2e4\ud788 \uc54c \uc218 \uc788\uc5b4.<\/p>\r\n\r\n<p>\ub9cc\uc57d \ubcf4\ubb3c\uc12c\uc774 Rummet\uc774\uc5c8\ub2e4\uace0 \uce58\uc790\uba74, Rummet\uc5d0\uc11c \ub3d9\ucabd\uc744 \ubc14\ub77c\ubcf4\uc558\uc744 \ub54c \uccab \ubc88\uc9f8 \ubcf4\ubb3c\uc9c0\ub3c4\ucc98\ub7fc \uc67c\ucabd\ubd80\ud130 Wisket, Ginnet, Vinnet \uc12c \uc21c\uc73c\ub85c \ubcf4\uc77c \uac83\uc774\uace0, \uc544\ub2c8\uba74 Liquorel, Cidrel \uc12c\ub4e4\uc774 \ubcf4\uc77c \uc218\ub3c4 \uc788\uc5b4. \uc544\uae4c \ub9d0\ud588\ub4ef\uc774 \uc548\uac1c \ub54c\ubb38\uc5d0 \uba87\uba87 \uc12c\ub4e4\uc774 \uadf8\ub824\uc9c0\uc9c0 \uc54a\uc740\ub370\ub2e4\uac00, \uc2e4\uc81c\ub85c \ubcfc \ub54c \uc774 \uc12c\ub4e4 \uc0ac\uc774\uc758 \uac70\ub9ac\uc640 \uc9c0\ub3c4\uc0c1\uc5d0 \uadf8\ub824\uc9c4 \uac70\ub9ac\ub294 \uc544\uc8fc \ub2e4\ub974\uace0 \ub4e4\uc465\ub0a0\uc465\ud558\uc9c0?<\/p>\r\n\r\n<p>\ud558\uc9c0\ub9cc \uc6b0\ub9ac\ub294 \uc774\uc81c \ubcf4\ubb3c\uc9c0\ub3c4\ubfd0 \uc544\ub2c8\ub77c \uadf8 \ud574\uc548\uc5d0 \uc5b4\ub5a4 \uc12c\uc774 \uc788\ub294\uc9c0\ub97c \uc544\uc8fc \uc815\ud655\ud788 \ub098\ud0c0\ub0b4\ub294 \uc870\uac10 \uc2dc\uc810\uc758 \uc9c0\ub3c4\ub3c4 \ucc3e\uc558\uc5b4! \uc774 \uc9c0\ub3c4\ub4e4\uc744 \uac16\uace0 \ubcf4\ubb3c\uc12c\uc774 \uc5b4\ub518\uc9c0 \ucc3e\uc544\ub0b4\uc11c \uae30\ud544\ucf54 \ud574\uc801\uc655\uc774 \ub418\uace0 \ub9d0 \uac70\uc57c!&nbsp;\ubcf4\ubb3c\uc12c\uc744&nbsp;\ucc3e\uc544\ub0bc \uc218 \uc788\uaca0\uc5b4?<\/p>\r\n","input":"<p>\uccab \ubc88\uc9f8 \uc904\uc5d0\ub294 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc758 \uac1c\uc218\uac00 \uc8fc\uc5b4\uc838. \uac01 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \ud615\uc2dd\uc73c\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc5b4.<\/p>\r\n\r\n<ul>\r\n\t<li>\uccab \ubc88\uc9f8 \uc904\uc5d0 \uc12c\uc758 \uac1c\uc218\ub97c \ub098\ud0c0\ub0b4\ub294 \uc815\uc218 n\uc774 \uc8fc\uc5b4\uc838. (1 &le; n &le; 125,000)<\/li>\r\n\t<li>\uc774\uc5b4\uc11c N\uac1c\uc758 \uc904\uc5d0 \uac01 \uc12c\uc758 \uc88c\ud45c\uac00 \uc815\uc218&nbsp;x<sub>i<\/sub>\uc640 y<sub>i<\/sub>\uac00 \uc8fc\uc5b4\uc838.&nbsp;(0 &lt; x<sub>i<\/sub>, y<sub>i<\/sub> &lt; 2<sup>29<\/sup>) i+1\ubc88\uc9f8 \uc904\uc740 \uc12c&nbsp;T<sub>i<\/sub>\uc758 \uc88c\ud45c\uc57c.<\/li>\r\n\t<li>\uc774\uc5b4\uc11c \ud558\ub098\uc758 \uc904\uc5d0, \uc774 \ubc14\ub2e4\uc5d0\uc11c \ud574\uacb0\ud574\uc57c \ud560 \ubb38\uc81c \uac1c\uc218 k\uac00 \uc8fc\uc5b4\uc838. \uac01 \ubb38\uc81c\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \ud615\uc2dd\uc73c\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc5b4.\r\n\t<ul>\r\n\t\t<li>\uccab \ubc88\uc9f8 \uc904\uc5d0 \uc815\ubcf4\uc758 \uac1c\uc218 m\uc774 \uc8fc\uc5b4\uc838. (0 &le; m &le; 10,000)<\/li>\r\n\t\t<li>\uc774\uc5b4\uc11c m\uac1c\uc758 \uc904\uc5d0 \ub450 \uc815\uc218 l, r\uc774 \uc8fc\uc5b4\uc838. (1 &le; l, r &le; n,&nbsp;l &ne; r) \uc774\uac74 \ubcf4\ubb3c\uc9c0\ub3c4\uc5d0\uc11c \uc12c T<sub>l<\/sub>\uc774 \uc12c T<sub>r<\/sub>\ubcf4\ub2e4 \uc67c\ucabd\uc5d0 \uadf8\ub824\uc84c\ub2e4\ub294 \ub73b\uc774\uc57c.<\/li>\r\n\t<\/ul>\r\n\t<\/li>\r\n<\/ul>\r\n\r\n<p>\uc5b4\ub5a4 \ubc14\ub2f7\uac00\ub4e0\uc9c0, \ub3d9\uc77c\ud55c x\uc88c\ud45c\ub97c \uac00\uc9c4 \ub450 \uc12c\uc740 \uc874\uc7ac\ud558\uc9c0 \uc54a\uace0, \ub3d9\uc77c\ud55c y\uc88c\ud45c\ub97c \uac00\uc9c4 \ub450 \uc12c\ub3c4 \uc874\uc7ac\ud558\uc9c0 \uc54a\uc544. \uadf8\ub9ac\uace0 \uc5b4\ub5a0\ud55c \uc138 \uc12c\ub3c4 \uc77c\uc9c1\uc120\uc0c1\uc5d0 \uc788\uc9c0 \uc54a\uc544.<\/p>\r\n","output":"<p>\uac01 \ubb38\uc81c\ub9c8\ub2e4 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\ub2f5\uc744 \ucd9c\ub825\ud558\uba74 \ub3fc.<\/p>\r\n\r\n<p>\ubcf4\ubb3c\uc12c\uc77c \uac00\ub2a5\uc131\uc774 \uc788\ub294 \uc12c\ub4e4\uc758 \ubc88\ud638\ub97c&nbsp;\uc624\ub984\ucc28\uc21c\uc73c\ub85c \ud55c \uc904\uc5d0 \ud558\ub098\uc529 \ucd9c\ub825\ud574.<\/p>\r\n\r\n<p>\ub9c8\uc9c0\ub9c9 \uc904\uc5d0\ub294 \uc815\uc218 0\uc744 \ud558\ub098 \ucd9c\ub825\ud574.<\/p>\r\n","hint":"<p>\uc8fc\uc5b4\uc9c4 \uc785\ub825 \uc608\uc81c\ub294 \ubb38\uc81c \uc124\uba85\uc5d0\uc11c \ubcf4\uc5ec\uc900 \uc9c0\ub3c4\ub97c \ub098\ud0c0\ub0b8 \uc608\uc81c\uc774\ub2e4. \uc8fc\uc5b4\uc9c4 \uc815\ubcf4\ub85c \ucd94\uce21\ud560 \uc218 \uc788\ub294 \ubcf4\ubb3c\uc12c\ub4e4\uc740 Rummet, Alet, Schnaphpsum\uc774\ub2e4.<\/p>\r\n","original":"0","html_title":"0","problem_lang_tcode":"Korean"},{"problem_id":"5383","problem_lang":"1","title":"Find the Treasure","description":"<p>Four hundred years ago, a group of pirates hid a treasure on an island in an archipelago that consists of many very small islands. Unfortunately, these pirates were particularly bad navigators and cartographers. Therefore, instead of a map, they made drawings of views from the top of the mountain on the treasure island. Each view shows two or more other islands of the archipelago that can be seen from the treasure island, ordered from left to right. The views also contain lots of fog, so the drawings may fail to show some islands that must have been in the field of view between the islands that appear in the drawing. For example, in Figure 2 below, if the treasure is hidden on Rummet, then the pirates could have drawn a view showing (from left to right) Wisket, Ginnet and Vinnet, or a view showing (from left to right) Liquorel and Cidrel. The pirates are known to have had acute vision, with a viewing angle of 180 degrees, but bad drawing skills: the distances between Wisket, Ginnet and Vinnet in their drawing are meaningless, and Liquorel may be drawn far to the left of Cidrel while in the actual view from Rummet, Liquorel must have been only slightly to the left of Cidrel, even obscuring part of it. Fortunately, all islands in the drawings can be identified easily thanks to the unique towers on top of each island.<\/p>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"\/upload\/images2\/treasure.png\" style=\"height:266px; width:586px\" \/><\/p>\r\n\r\n<p style=\"text-align: center;\">Figure 2: Map of a hypothetical archipelago, and some views from Rummet as the pirates could have drawn them.<\/p>\r\n\r\n<p>Now, four hundred years later, you have got the pirates&rsquo; drawings and an excellent, accurate map of the archipelago, showing all islands. On which island is the treasure hidden?<\/p>\r\n","input":"<p>The first line of the input contains a single number: the number of archipelagos to follow. Each<br \/>\r\narchipelago has the following format:<\/p>\r\n\r\n<ul>\r\n\t<li>One line with an integer n, satisfying 1 &le; n &le; 125,000: the number of islands in the archipelago.<\/li>\r\n\t<li>n lines, each with two integers x<sub>i<\/sub> and y<sub>i<\/sub>, satisfying 0 &lt; x<sub>i<\/sub> &lt; 2<sup>29<\/sup> and 0 &lt; y<sub>i<\/sub> &lt; 2<sup>29<\/sup>: these are the coordinates of the tower T<sub>i<\/sub> on each island.<\/li>\r\n\t<li>One line with an integer k: the number of test cases for this archipelago. Each test case has the following format:\r\n\t<ul>\r\n\t\t<li>One line with an integer m, satisfying 0 &le; m &le; 10, 000: the number of pairs of islands that appear in the pirates&rsquo; drawings.<\/li>\r\n\t\t<li>m lines, each with two integers l and r such that 1 &le; l &le; n, 1 &le; r &le; n, l &ne; r, meaning that the tower T<sub>l<\/sub> is drawn to the left of tower T<sub>r<\/sub>.<\/li>\r\n\t<\/ul>\r\n\t<\/li>\r\n<\/ul>\r\n\r\n<p>In any archipelago, no two towers have the same x-coordinate, no two towers have the same y-coordinate, and no three towers lie on a line.<\/p>\r\n","output":"<p>For every test case in the input, the output should contain:<\/p>\r\n\r\n<ul>\r\n\t<li>One line with an integer i (1 &le; i &le; n), identifying the i-th island in the archipelago, for each island that could be the treasure island. These lines need to be in increasing order.<\/li>\r\n\t<li>One line containing the number 0.<\/li>\r\n<\/ul>\r\n","hint":"<p>The following input describes one archipelago with one test case, namely the information corresponding to the map and the views shown in Figure 2. The potential treasure islands are Rummet, Alet, and Schnahpsum.<\/p>\r\n","original":"1","html_title":"0","problem_lang_tcode":"English"}]

출처

ICPC > Regionals > Europe > Northwestern European Regional Contest > Benelux Algorithm Programming Contest > BAPC 2011 C번

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