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31397번 - 반 나누기 (Hard) 스페셜 저지다국어

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문제

루타비스의 수호자, 시간술사 반반은 모든 음식을 반으로 먹는 것을 즐깁니다. 비록 후라이드 양념 반반 치킨을 먹지는 않지만, 중식은 항상 짬짜면을, 피자집에서는 항상 하프 앤 하프 피자를 주문합니다.

생일을 맞은 반반은 그의 동료인 어릿광대 피에르에게서 볼록다각형 모양의 케이크를 하나 선물받았습니다. 반반은 이 케이크를 일직선으로 한 번 잘라서 반으로 나눠 먹고 싶습니다. 특히 나눠진 후의 케이크 밑면의 면적과 둘레가 똑같도록 하고 싶습니다.

반반이 원하는 대로 케이크를 두 조각으로 나눌 수 있을까요?

입력

첫 줄에는 반반이 선물받은 케이크 밑면의 모양인 볼록다각형의 꼭짓점 개수 $N$이 주어집니다. $(3 \le N \le 200,000円)$

다음 $N$개의 줄의 $i$번째 줄에는 볼록다각형의 $i$번째 점의 좌표를 의미하는 두 정수 $x_i, y_i$가 공백으로 구분되어 주어집니다. $(-10^7 \le x_i, y_i \le 10^7)$

꼭짓점은 다각형의 어느 한 점에서 시작해서 반시계방향으로 주어지며, 서로 다른 세 점이 한 직선 위에 있는 경우는 없습니다.

출력

첫 줄에, 케이크를 넓이와 둘레가 같은 두 도형으로 분할할 수 있다면 YES, 없다면 NO를 출력하세요.

첫 줄에 YES를 출력한 경우, 칼질을 시작하고 끝내는 두 점이 각각 $x_j$와 $x_{j+1}$의 $\alpha : 1-\alpha$ 내분점, $x_k$와 $x_{k+1}$의 $\beta: 1-\beta$ 내분점인 경우, 둘째 줄에 $j$와 $\alpha$를 공백으로 구분하여, 셋째 줄에 $k$와 $\beta$를 공백으로 구분하여 출력하세요. 이 때, $x_{N+1} = x_1$이라고 생각합니다. $(1 \le j, k \le N;$ 0ドル \le \alpha, \beta \le 1)$

두 점을 이은 선분을 기준으로 볼록다각형을 나누었을 때, 나뉜 두 도형의 넓이와 둘레의 절대 혹은 상대 오차가 10ドル^{-6}$ 이하여야 합니다.

제한

예제 입력 1

3
0 0
10 0
5 10

예제 출력 1

YES
1 0.500000000000
2 1.000000000000

예제 입력 2

4
4 0
10 10
0 7
0 6

예제 출력 2

YES
1 0.918970085714
4 0.384322207567


노트

두 점 $(a, b)$와 $(c, d)$의 $t:1-t$ 내분점은 $(a(1-t)+ct, b(1-t)+dt)$입니다.

[{"problem_id":"31397","problem_lang":"0","title":"\ubc18 \ub098\ub204\uae30 (Hard)","description":"<p>\ub8e8\ud0c0\ube44\uc2a4\uc758 \uc218\ud638\uc790, \uc2dc\uac04\uc220\uc0ac \ubc18\ubc18\uc740 \ubaa8\ub4e0 \uc74c\uc2dd\uc744 \ubc18\uc73c\ub85c \uba39\ub294 \uac83\uc744 \uc990\uae41\ub2c8\ub2e4. \ube44\ub85d \ud6c4\ub77c\uc774\ub4dc \uc591\ub150 \ubc18\ubc18 \uce58\ud0a8\uc744 \uba39\uc9c0\ub294 \uc54a\uc9c0\ub9cc, \uc911\uc2dd\uc740 \ud56d\uc0c1 \uc9ec\uc9dc\uba74\uc744, \ud53c\uc790\uc9d1\uc5d0\uc11c\ub294 \ud56d\uc0c1 \ud558\ud504 \uc564 \ud558\ud504 \ud53c\uc790\ub97c \uc8fc\ubb38\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/fe7fe2bb-79c5-4a99-a34b-8db3d956f968\/\/\" \/><\/p>\r\n\r\n<p>\uc0dd\uc77c\uc744 \ub9de\uc740 \ubc18\ubc18\uc740 \uadf8\uc758 \ub3d9\ub8cc\uc778 \uc5b4\ub9bf\uad11\ub300 \ud53c\uc5d0\ub974\uc5d0\uac8c\uc11c \ubcfc\ub85d\ub2e4\uac01\ud615 \ubaa8\uc591\uc758 \ucf00\uc774\ud06c\ub97c \ud558\ub098 \uc120\ubb3c\ubc1b\uc558\uc2b5\ub2c8\ub2e4. \ubc18\ubc18\uc740 \uc774 \ucf00\uc774\ud06c\ub97c \uc77c\uc9c1\uc120\uc73c\ub85c \ud55c \ubc88 \uc798\ub77c\uc11c \ubc18\uc73c\ub85c \ub098\ub220 \uba39\uace0 \uc2f6\uc2b5\ub2c8\ub2e4. \ud2b9\ud788 \ub098\ub220\uc9c4 \ud6c4\uc758 \ucf00\uc774\ud06c \ubc11\uba74\uc758 \uba74\uc801\uacfc \ub458\ub808\uac00 \ub611\uac19\ub3c4\ub85d \ud558\uace0 \uc2f6\uc2b5\ub2c8\ub2e4.<\/p>\r\n\r\n<p>\ubc18\ubc18\uc774 \uc6d0\ud558\ub294 \ub300\ub85c \ucf00\uc774\ud06c\ub97c \ub450 \uc870\uac01\uc73c\ub85c \ub098\ub20c \uc218 \uc788\uc744\uae4c\uc694?<\/p>\r\n","input":"<p>\uccab \uc904\uc5d0\ub294 \ubc18\ubc18\uc774 \uc120\ubb3c\ubc1b\uc740 \ucf00\uc774\ud06c \ubc11\uba74\uc758 \ubaa8\uc591\uc778 \ubcfc\ub85d\ub2e4\uac01\ud615\uc758 \uaf2d\uc9d3\uc810 \uac1c\uc218 $N$\uc774 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4. $(3 \\le N \\le 200\\,000)$<\/p>\r\n\r\n<p>\ub2e4\uc74c $N$\uac1c\uc758 \uc904\uc758 $i$\ubc88\uc9f8 \uc904\uc5d0\ub294 \ubcfc\ub85d\ub2e4\uac01\ud615\uc758 $i$\ubc88\uc9f8 \uc810\uc758 \uc88c\ud45c\ub97c \uc758\ubbf8\ud558\ub294 \ub450 \uc815\uc218 $x_i, y_i$\uac00 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4. $(-10^7 \\le x_i, y_i \\le 10^7)$<\/p>\r\n\r\n<p>\uaf2d\uc9d3\uc810\uc740 \ub2e4\uac01\ud615\uc758 \uc5b4\ub290 \ud55c \uc810\uc5d0\uc11c \uc2dc\uc791\ud574\uc11c \ubc18\uc2dc\uacc4\ubc29\ud5a5\uc73c\ub85c \uc8fc\uc5b4\uc9c0\uba70, \uc11c\ub85c \ub2e4\ub978 \uc138 \uc810\uc774 \ud55c \uc9c1\uc120 \uc704\uc5d0 \uc788\ub294 \uacbd\uc6b0\ub294 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\r\n","output":"<p>\uccab \uc904\uc5d0, \ucf00\uc774\ud06c\ub97c \ub113\uc774\uc640 \ub458\ub808\uac00 \uac19\uc740 \ub450 \ub3c4\ud615\uc73c\ub85c \ubd84\ud560\ud560 \uc218 \uc788\ub2e4\uba74 <span style=\"color:#e74c3c;\"><code>YES<\/code><\/span>, \uc5c6\ub2e4\uba74 <span style=\"color:#e74c3c;\"><code>NO<\/code><\/span>\ub97c \ucd9c\ub825\ud558\uc138\uc694.<\/p>\r\n\r\n<p>\uccab \uc904\uc5d0 <code><span style=\"color:#e74c3c;\">YES<\/span><\/code>\ub97c \ucd9c\ub825\ud55c \uacbd\uc6b0, \uce7c\uc9c8\uc744 \uc2dc\uc791\ud558\uace0 \ub05d\ub0b4\ub294 \ub450 \uc810\uc774 \uac01\uac01 $x_j$\uc640 $x_{j+1}$\uc758 $\\alpha : 1-\\alpha$ \ub0b4\ubd84\uc810, $x_k$\uc640 $x_{k+1}$\uc758 $\\beta: 1-\\beta$ \ub0b4\ubd84\uc810\uc778 \uacbd\uc6b0, \ub458\uc9f8 \uc904\uc5d0 $j$\uc640 $\\alpha$\ub97c \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ud558\uc5ec, \uc14b\uc9f8 \uc904\uc5d0 $k$\uc640 $\\beta$\ub97c \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ud558\uc5ec \ucd9c\ub825\ud558\uc138\uc694. \uc774 \ub54c, $x_{N+1} = x_1$\uc774\ub77c\uace0 \uc0dd\uac01\ud569\ub2c8\ub2e4. $(1 \\le j, k \\le N;$ $0 \\le \\alpha, \\beta \\le 1)$<\/p>\r\n\r\n<p>\ub450 \uc810\uc744 \uc774\uc740 \uc120\ubd84\uc744 \uae30\uc900\uc73c\ub85c \ubcfc\ub85d\ub2e4\uac01\ud615\uc744 \ub098\ub204\uc5c8\uc744 \ub54c, \ub098\ub25c \ub450 \ub3c4\ud615\uc758 \ub113\uc774\uc640 \ub458\ub808\uc758 \uc808\ub300 \ud639\uc740 \uc0c1\ub300 \uc624\ucc28\uac00 $10^{-6}$ \uc774\ud558\uc5ec\uc57c \ud569\ub2c8\ub2e4.<\/p>\r\n","hint":"<p>\ub450 \uc810 $(a, b)$\uc640 $(c, d)$\uc758 $t:1-t$ \ub0b4\ubd84\uc810\uc740 $(a(1-t)+ct, b(1-t)+dt)$\uc785\ub2c8\ub2e4.<\/p>\r\n","original":"1","html_title":"0","problem_lang_tcode":"Korean","sample_explain_1":"<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/3c1363a7-6b67-405c-b4af-6da3b83b6eff\/-\/preview\/\" style=\"height: 286px; width: 300px;\" \/><\/p>\r\n","sample_explain_2":"<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/251f8a7f-1087-43f2-93b5-d39899f1049f\/-\/preview\/\" style=\"height: 197px; width: 300px;\" \/><br \/>\r\n&nbsp;<\/p>\r\n"},{"problem_id":"31397","problem_lang":"1","title":"Bon Split (Hard)","description":"<p>Time Mage Von Bon,&nbsp;guardian of Root Abyss, likes it when he can split his food in half. Although he doesn&#39;t eat half original half spicy chicken, he always orders his pizza half cheese and half pepperoni.<\/p>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/b9d200cb-3919-437c-ae7b-d4bcea3c43c5\/\/\" \/><\/p>\r\n\r\n<p>Today is Von Bon&#39;s birthday, and his friend Pierre gifted him a cake in the shape of a convex polygon. Von Bon wishes to split this cake into two pieces by drawing one straight line across it such that both pieces have the same area and perimeter.<\/p>\r\n\r\n<p>Can Von Bon split the cake as he wishes?<\/p>\r\n","input":"<p>The first line of input contains $N$, denoting the number of points forming the convex polygon representing&nbsp;the base of the cake.&nbsp;$(3 \\le N \\le 200\\,000)$<\/p>\r\n\r\n<p>The $i$-th of the next $N$ lines of input contains two space-separated integers $x_i, y_i$, denoting the coordinates of the $i$-th point.&nbsp;$(-10^7 \\le x_i, y_i \\le 10^7)$<\/p>\r\n\r\n<p>No three points are collinear, and the points are given in anticlockwise order starting from the first point.<\/p>\r\n","output":"<p>The first line of output should contain&nbsp;<span style=\"color:#e74c3c;\"><code>YES<\/code><\/span> if the cake can be split into two pieces of equal area and perimeter. Otherwise, print <span style=\"color:#e74c3c;\"><code>NO<\/code><\/span>.<\/p>\r\n\r\n<p>If the first line of output was <span style=\"color:#e74c3c;\"><code>YES<\/code><\/span>, print two additional lines. Suppose&nbsp;the cut starts at the point which internally divides the line segment $x_j$$x_{j+1}$ in the ratio&nbsp;$\\alpha : 1-\\alpha$, and ends at the point which internally divides&nbsp;$x_k$$x_{k+1}$ in the ratio $\\beta: 1-\\beta$. Print $j$ and $\\alpha$ in the second line separated by a space,&nbsp;then print&nbsp;$k$ and&nbsp;$\\beta$ in the third line separated by a space. Here, we assume $x_{N+1} = x_1$. $(1 \\le j, k \\le N;$ $0 \\le \\alpha, \\beta \\le 1)$<\/p>\r\n\r\n<p>When the convex polygon is split by the line segment connecting the two points, the absolute or relative error in the area and perimeter of the two resulting polygons must not exceed&nbsp;$10^{-6}$.<\/p>\r\n","hint":"<p>The point which internally divides the line segment $(a, b)$ to $(c, d)$ in the ratio $t: 1-t$ is $(a(1-t)+ct, b(1-t)+dt)$.<\/p>\r\n","original":"0","html_title":"0","problem_lang_tcode":"English","sample_explain_1":"<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/3c1363a7-6b67-405c-b4af-6da3b83b6eff\/-\/preview\/\" style=\"height: 286px; width: 300px;\" \/><\/p>\r\n","sample_explain_2":"<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/251f8a7f-1087-43f2-93b5-d39899f1049f\/-\/preview\/\" style=\"height: 197px; width: 300px;\" \/><\/p>\r\n"}]

출처

Contest > solved.ac > solved.ac Grand Arena #4 > Division 1 C번

(追記) (追記ここまで)

출처

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