시간 제한 메모리 제한 제출 정답 맞은 사람 정답 비율
3 초 128 MB 221 59 45 34.091%

문제

한려해상국립공원은 한반도의 남쪽에 있으며, 120km에 걸친 독특한 해양 생태계를 가지고 있다. 공원은 360개 이상의 섬으로 이루어져 있으며, 섬의 크기도 모두 제각각 다르다. 69개의 무인도와 30개의 유인도로 이루어진 아름다운 수로는 바다의 보석과 같다는 찬사를 받는다.

공원 관리자 김상근은 등고선을 이용해 공원 내의 모든 섬의 고도를 조사하려고 한다. 등고선은 해발 고도가 같은 지점을 연결한 곡선이며, 볼록한 닫힌 곡선이다. (그림 1)

한려해상국립공원의 섬을 나타내는 등고선은 서로 겹치지 않으며, 타원과 같은 단순 볼록 곡선이며 닫혀있다. 

컴퓨터는 등고선 지도를 디지털 등고선 지도로 변형해서 사용한다. 디지털 등고선 지도의 등고선은 볼록 직교 다각형 (그림 2) 이다. 직교 다각형이란 모든 변이 수직 또는 수평인 다각형이다. 직교 다각형 P가 볼록이 되려면, P의 모든 내부와 수직선 또는 수평선과의 교점이 비어있거나 선분이어야 한다.

가장 바깥에 있는 등고선은 레벨 1이다. 등고선 c를 둘러싼 등고선의 레벨이 k인 경우에 c의 레벨은 k+1이다. 그림 2에의 지도에서 가장 높은 등고선의 레벨은 5이다.

등고선 n개로 이루어진 디지털 등고선 지도가 주어진다. 이 때, 가장 높은 등고선의 레벨을 구하는 프로그램을 작성하시오.

입력

첫째 줄에 테스트 케이스의 개수 T가 주어진다. 각 테스트 케이스의 첫째 줄에는 등고선의 개수 m(1 ≤ m ≤ 20,000)이 주어진다. 다음 m개 줄에는 각 등고선의 정보를 나타내는 2k+1개의 정수 k, x1, y1, x2, y2, ..., xk, yk (4 ≤ k ≤ 100, 1 ≤ xi, yi ≤ 109) 가 주어진다. k는 볼록 직교 다각형 Q의 꼭지점의 개수를 나타내며, (xi, yi)는 Q의 꼭지점을 나타낸다. 꼭지점은 반시계방향으로 주어진다. 두 볼록 직교 다각형이 겹치는 경우는 없다.

출력

각 테스트 케이스마다 가장 높은 등고선의 레벨을 출력한다.

예제 입력 1

2
5
4 5 3 14 3 14 12 5 12
4 6 4 13 4 13 11 6 11
4 7 5 12 5 12 10 7 10
4 8 6 11 6 11 9 8 9
4 9 7 10 7 10 8 9 8
4
4 10 7 11 7 11 8 10 8
6 3 7 5 7 5 9 6 9 6 12 3 12
6 8 5 9 5 9 6 12 6 12 9 8 9 
10 9 2 9 3 14 3 14 11 7 11 7 8 6 8 6 4 4 4 4 2

예제 출력 1

5
3

힌트

[{"problem_id":"8889","problem_lang":"0","title":"\ub4f1\uace0\uc120 \uc9c0\ub3c4","description":"<p>\ud55c\ub824\ud574\uc0c1\uad6d\ub9bd\uacf5\uc6d0\uc740 \ud55c\ubc18\ub3c4\uc758 \ub0a8\ucabd\uc5d0 \uc788\uc73c\uba70, 120km\uc5d0 \uac78\uce5c \ub3c5\ud2b9\ud55c \ud574\uc591 \uc0dd\ud0dc\uacc4\ub97c \uac00\uc9c0\uace0 \uc788\ub2e4. \uacf5\uc6d0\uc740 360\uac1c \uc774\uc0c1\uc758 \uc12c\uc73c\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc73c\uba70, \uc12c\uc758 \ud06c\uae30\ub3c4 \ubaa8\ub450 \uc81c\uac01\uac01 \ub2e4\ub974\ub2e4. 69\uac1c\uc758 \ubb34\uc778\ub3c4\uc640 30\uac1c\uc758 \uc720\uc778\ub3c4\ub85c \uc774\ub8e8\uc5b4\uc9c4 \uc544\ub984\ub2e4\uc6b4 \uc218\ub85c\ub294 \ubc14\ub2e4\uc758 \ubcf4\uc11d\uacfc \uac19\ub2e4\ub294 \ucc2c\uc0ac\ub97c \ubc1b\ub294\ub2e4.<\/p>\r\n\r\n<p>\uacf5\uc6d0 \uad00\ub9ac\uc790 \uae40\uc0c1\uadfc\uc740 \ub4f1\uace0\uc120\uc744 \uc774\uc6a9\ud574 \uacf5\uc6d0 \ub0b4\uc758 \ubaa8\ub4e0 \uc12c\uc758 \uace0\ub3c4\ub97c \uc870\uc0ac\ud558\ub824\uace0 \ud55c\ub2e4. \ub4f1\uace0\uc120\uc740 \ud574\ubc1c \uace0\ub3c4\uac00 \uac19\uc740 \uc9c0\uc810\uc744 \uc5f0\uacb0\ud55c \uace1\uc120\uc774\uba70, \ubcfc\ub85d\ud55c \ub2eb\ud78c \uace1\uc120\uc774\ub2e4. (\uadf8\ub9bc 1)<\/p>\r\n\r\n<p>\ud55c\ub824\ud574\uc0c1\uad6d\ub9bd\uacf5\uc6d0\uc758 \uc12c\uc744 \ub098\ud0c0\ub0b4\ub294 \ub4f1\uace0\uc120\uc740 \uc11c\ub85c \uacb9\uce58\uc9c0 \uc54a\uc73c\uba70, \ud0c0\uc6d0\uacfc \uac19\uc740 \ub2e8\uc21c \ubcfc\ub85d \uace1\uc120\uc774\uba70 \ub2eb\ud600\uc788\ub2e4.&nbsp;<\/p>\r\n\r\n<p>\ucef4\ud4e8\ud130\ub294 \ub4f1\uace0\uc120 \uc9c0\ub3c4\ub97c \ub514\uc9c0\ud138 \ub4f1\uace0\uc120 \uc9c0\ub3c4\ub85c \ubcc0\ud615\ud574\uc11c \uc0ac\uc6a9\ud55c\ub2e4. \ub514\uc9c0\ud138 \ub4f1\uace0\uc120 \uc9c0\ub3c4\uc758 \ub4f1\uace0\uc120\uc740 \ubcfc\ub85d \uc9c1\uad50 \ub2e4\uac01\ud615 (\uadf8\ub9bc 2) \uc774\ub2e4. \uc9c1\uad50 \ub2e4\uac01\ud615\uc774\ub780 \ubaa8\ub4e0 \ubcc0\uc774 \uc218\uc9c1 \ub610\ub294 \uc218\ud3c9\uc778 \ub2e4\uac01\ud615\uc774\ub2e4. \uc9c1\uad50 \ub2e4\uac01\ud615 P\uac00 \ubcfc\ub85d\uc774 \ub418\ub824\uba74, P\uc758 \ubaa8\ub4e0 \ub0b4\ubd80\uc640 \uc218\uc9c1\uc120 \ub610\ub294 \uc218\ud3c9\uc120\uacfc\uc758 \uad50\uc810\uc774 \ube44\uc5b4\uc788\uac70\ub098 \uc120\ubd84\uc774\uc5b4\uc57c \ud55c\ub2e4.<\/p>\r\n\r\n<p>\uac00\uc7a5 \ubc14\uae65\uc5d0 \uc788\ub294 \ub4f1\uace0\uc120\uc740 \ub808\ubca8 1\uc774\ub2e4. \ub4f1\uace0\uc120 c\ub97c \ub458\ub7ec\uc2fc \ub4f1\uace0\uc120\uc758 \ub808\ubca8\uc774 k\uc778 \uacbd\uc6b0\uc5d0 c\uc758 \ub808\ubca8\uc740 k+1\uc774\ub2e4. \uadf8\ub9bc 2\uc5d0\uc758 \uc9c0\ub3c4\uc5d0\uc11c \uac00\uc7a5 \ub192\uc740 \ub4f1\uace0\uc120\uc758 \ub808\ubca8\uc740 5\uc774\ub2e4.<\/p>\r\n\r\n<p><img alt=\"\" src=\"\/upload\/images\/cantour2.png\" style=\"height:273px; width:643px\" \/><\/p>\r\n\r\n<p>\ub4f1\uace0\uc120 n\uac1c\ub85c \uc774\ub8e8\uc5b4\uc9c4 \ub514\uc9c0\ud138 \ub4f1\uace0\uc120 \uc9c0\ub3c4\uac00 \uc8fc\uc5b4\uc9c4\ub2e4. \uc774 \ub54c, \uac00\uc7a5 \ub192\uc740 \ub4f1\uace0\uc120\uc758 \ub808\ubca8\uc744 \uad6c\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud558\uc2dc\uc624.<\/p>\r\n","input":"<p>\uccab\uc9f8 \uc904\uc5d0 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc758 \uac1c\uc218 T\uac00 \uc8fc\uc5b4\uc9c4\ub2e4. \uac01 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc758 \uccab\uc9f8 \uc904\uc5d0\ub294 \ub4f1\uace0\uc120\uc758 \uac1c\uc218 m(1 &le; m &le; 20,000)\uc774 \uc8fc\uc5b4\uc9c4\ub2e4. \ub2e4\uc74c m\uac1c \uc904\uc5d0\ub294 \uac01 \ub4f1\uace0\uc120\uc758 \uc815\ubcf4\ub97c \ub098\ud0c0\ub0b4\ub294 2k+1\uac1c\uc758 \uc815\uc218 k, x<sub>1<\/sub>, y<sub>1<\/sub>, x<sub>2<\/sub>, y<sub>2<\/sub>, ..., x<sub>k<\/sub>, y<sub>k<\/sub> (4 &le; k &le; 100, 1 &le; x<sub>i<\/sub>, y<sub>i<\/sub> &le; 10<sup>9<\/sup>) \uac00 \uc8fc\uc5b4\uc9c4\ub2e4. k\ub294 \ubcfc\ub85d \uc9c1\uad50 \ub2e4\uac01\ud615 Q\uc758 \uaf2d\uc9c0\uc810\uc758 \uac1c\uc218\ub97c \ub098\ud0c0\ub0b4\uba70, (x<sub>i<\/sub>, y<sub>i<\/sub>)\ub294 Q\uc758 \uaf2d\uc9c0\uc810\uc744 \ub098\ud0c0\ub0b8\ub2e4. \uaf2d\uc9c0\uc810\uc740 \ubc18\uc2dc\uacc4\ubc29\ud5a5\uc73c\ub85c \uc8fc\uc5b4\uc9c4\ub2e4. \ub450 \ubcfc\ub85d \uc9c1\uad50 \ub2e4\uac01\ud615\uc774 \uacb9\uce58\ub294 \uacbd\uc6b0\ub294 \uc5c6\ub2e4.<\/p>\r\n","output":"<p>\uac01 \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\ub9c8\ub2e4 \uac00\uc7a5 \ub192\uc740 \ub4f1\uace0\uc120\uc758 \ub808\ubca8\uc744 \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"<p><img alt=\"\" src=\"\/upload\/images\/cantour3.png\" style=\"height:227px; width:593px\" \/><\/p>\r\n","original":"0","problem_lang_code":"\ud55c\uad6d\uc5b4"},{"problem_id":"8889","problem_lang":"1","title":"Contour Maps","description":"<p>Hallyeohaesang national park is located in the south of the Korean Peninsula. Hallyeohaesang is a unique marine ecosystem which extends along 120km. The park is studded with more than 360 islands, large and small. Specially, Hallyeosudo which is known as the most beautiful waterway ever has 69 uninhabited islands and 30 inhabited islands spread out across the sea like jewels.&nbsp;<\/p>\r\n\r\n<p>Mr. Kim, a park superintendent, plans to conduct a survey about the elevations of all islands of the park. He has contour maps of the islands. A contour map shows elevations above sea level and surface features of the land by means of contour lines. A contour line is a closed curve which joins points of equal elevation above a given level (see Figure 1).&nbsp;<\/p>\r\n\r\n<p>The contour lines of the islands in the park, do not intersect each other, and are simple convex closed curves like ellipses. In order to use a computer, he first converted the original contour maps to corresponding digital contour maps. In a digital contour map, a contour line is represented as the boundary of a rectilinear convex polygon (see Figure. 2). A rectilinear polygon is a polygon whose edges are either horizontal or vertical. A rectilinear polygon P is called convex if the intersection of the interior of P and a vertical or horizontal line is either empty or a line segment. A level is a predefined measure for elevation. The outermost contour line is at level 1. If the closest contour line surrounding a contour line c is at level k, then c is at level k+1. In Figure 2, the level of the highest contour line that we can see in the map is 5.&nbsp;<\/p>\r\n\r\n<p><img alt=\"\" src=\"\/upload\/images\/cantour2.png\" style=\"height:273px; width:643px\" \/><\/p>\r\n\r\n<p>Given a contour map with n contour lines that are represented as the boundaries of rectilinear convex polygons, write a program that computes the level of the highest contour line in the map.<\/p>\r\n","input":"<p>Your program is to read from standard input. The input consists of T test cases. The number of test cases T is given in the first line of the input. Each test case starts with a line containing an integer m (1 &le; m &le; 20,000), where m is the number of rectilinear convex polygons representing contour lines, In the next m lines of each test case, each line contains 2k+1 integers k, x<sub>1<\/sub>, y<sub>1<\/sub>, x<sub>2<\/sub>, y<sub>2<\/sub>, ..., x<sub>k<\/sub>, and y<sub>k<\/sub> (4 &le; k &le; 100, 1 &le; x<sub>i<\/sub>, y<sub>i<\/sub> &le; 10<sup>9<\/sup>), where k is the number of vertices of a rectilinear convext polygon Q and (x<sub>i<\/sub>, y<sub>i<\/sub>)&#39;s are coordinates of k vertices of Q, which are in counterclockwise order. Notice that the boundaries of any two rectilinear convex polygons do not intersect each others.&nbsp;<\/p>\r\n\r\n<p>&nbsp;<\/p>\r\n","output":"<p>Your program is to write to standard output. Print exactly one line for each test case. The line should contain an integer, the level of the highest contour line in the map.&nbsp;<\/p>\r\n","hint":"<p><img alt=\"\" src=\"\/upload\/images\/cantour3.png\" style=\"height:227px; opacity:0.9; width:593px\" \/><\/p>\r\n\r\n<p>Figure 3. Illustrations for Sample Input.<\/p>\r\n","original":"1","problem_lang_code":"\uc601\uc5b4"}]

출처

ACM-ICPC > Regionals > Asia > Korea > Asia Regional - Daejeon 2012 B번