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31546번 - 재우의 재수강 2 서브태스크스페셜 저지다국어

시간 제한메모리 제한제출정답맞힌 사람정답 비율
1 초 1024 MB110361220.339%

문제

이 문제는 재우의 재수강 1굵은 글씨로 적힌 부분과 제한 조건만 다릅니다.

재우는 제2회 MatKor Cup에서 수영 과목의 F를 막지 못해 결국 재수강을 하게 되었다. 재우는 이번 학기에는 성실히 수영 수업에 임했고, 이제 최종 평가만을 남겨두었다. 최종 평가는 다음과 같이 진행된다.

먼저 수영장을 2차원 좌표계로 표현할 수 있다. 수영장은 왼쪽 아래의 점을 $(0,0),ドル 오른쪽 위의 점을 $(w,h)$로 하는 각 변이 $x$축 혹은 $y$축과 평행한 직사각형이다. 여기서 “수영 가능 영역”이란 직사각형의 네 변과 그 변들로 둘러싸인 영역을 의미한다.

수영장에는 $n$개의 레인이 있고, 각 레인은 $x$축과 평행한 선으로 구분되어 있다. 구체적으로, 0ドル=a_0<a_1<a_2<\cdots <a_n=h$일 때, $i$번째 레인은 $a_{i-1}\le y<a_{i}$인 구간이다. 단, 마지막인 $n$번째 레인은 $a_{n-1}\le y\le a_n$인 구간으로 정의한다.

이 수영장은 최첨단 시스템이 적용되어, 레인별로 물의 밀도가 다르다. 따라서 재우가 이동하는 속도는 어떤 레인에서 수영하느냐에 따라 달라진다. 구체적으로 $i$번째 레인의 물의 밀도가 $p_i$일때, 재우는 1ドル$만큼을 이동하는 데 $p_i$초가 소요된다. 이때, $x$축에서 먼 레인일수록 물의 밀도는 감소한다. 즉, $p_1>p_2>\cdots >p_n$을 만족한다.

재우는 최종 평가를 진행할 때 $(0,0)$에서 출발해 수영 가능 영역에서 수영을 통해서만 이동하여 도착점에 도착해야 한다. 도착점은 $(w,d)$로 수영장의 오른쪽 세로 변 위에 있다. 재우는 출발점에서 출발해서 도착점에 도착할 때까지 걸리는 최단 시간을 알고 싶다.

재우는 수영 가능 영역에서 자유롭게 이동할 수 있다고 할 때, 답을 구해보자.

입력

첫 번째 줄에 수영장의 오른쪽 위의 점을 나타내는 정수 $w$와 $h$가 공백으로 구분되어 주어진다. $(1\le w,h\le 1,000円)$

두 번째 줄에 레인의 개수 $n$과 도착점의 $y$좌표를 나타내는 정수 $d$가 공백으로 구분되어 주어진다. $(1\le n\le 1,000円;$ 0ドル\le d\le h)$

세 번째 줄에 레인의 구분을 나타내는 정수 $a_1,ドル $a_2,ドル $\cdots,ドル $a_n$이 공백으로 구분되어 주어진다. $(0<a_1<a_2<\cdots <a_n=h)$

네 번째 줄에 레인별 물의 밀도 $p_1,ドル $p_2,ドル $\cdots,ドル $p_n$이 공백으로 구분되어 주어진다. $(1\le p_i\le 1,円 000;$ $p_1>p_2>\cdots >p_n)$

출력

도착점에 도착하기까지 걸리는 최단 시간을 출력한다.

정답과의 절대오차 또는 상대오차가 10ドル^{-6}$ 이하이면 정답으로 인정된다.

제한

서브태스크

번호배점제한
111

$n = 1$

252

$n \le 2;$ $d = h$

3161

$n \le 2$

477

$d = h$

5199

추가적인 제한 조건 없음

예제 입력 1

3 8
1 4
8
2

예제 출력 1

10

아래 그림은 정답이 될 수 있는 경로 중 하나이다. 구체적으로 다음과 같은 경로를 지나며, 총 시간은 10ドル$이다.

  • $(0,0)$ $(3,4)$: $\sqrt{3^2+4^2} \times 2 = 10$

예제 입력 2

11 10
2 10
4 10
4 3

예제 출력 2

50

아래 그림은 정답이 될 수 있는 경로 중 하나이다. 구체적으로 다음과 같은 경로를 지나며, 총 시간은 20ドル + 30 = 50$이다.

  • $(0,0)$ $(3,4)$: $\sqrt{3^2+4^2} \times 4 = 20$
  • $(3,4)$ $(11,10)$: $\sqrt{8^2+6^2} \times 3 = 30$

예제 입력 3

25 10
2 4
8 10
5 3

예제 출력 3

123

아래 그림은 정답이 될 수 있는 경로 중 하나이다. 구체적으로 다음과 같은 경로를 지나며, 총 시간은 50ドル+48+25=123$이다.

  • $(0,0)$ $(6,8)$: $\sqrt{6^2+8^2} \times 5 = 50$
  • $(6,8)$ $(22,8)$: 16ドル \times 3 = 48$
  • $(22,8)$ $(25,4)$: $\sqrt{3^2+4^2} \times 5 = 25$

예제 입력 4

5 10
3 10
2 6 10
100 5 1

예제 출력 4

226.164706

예제 입력 5

5 10
3 4
2 6 10
100 5 1

예제 출력 5

226.710751

노트

다행히도 재우는 이번에는 수영 과목에서 Pass를 받았다.

[{"problem_id":"31546","problem_lang":"0","title":"\uc7ac\uc6b0\uc758 \uc7ac\uc218\uac15 2","description":"<blockquote>\r\n<p>\uc774 \ubb38\uc81c\ub294 <a href=\"\/problem\/31535\">\uc7ac\uc6b0\uc758 \uc7ac\uc218\uac15 1<\/a>\uacfc <strong>\uad75\uc740<\/strong> \uae00\uc528\ub85c \uc801\ud78c \ubd80\ubd84\uacfc \uc81c\ud55c \uc870\uac74\ub9cc \ub2e4\ub985\ub2c8\ub2e4.<\/p>\r\n<\/blockquote>\r\n\r\n<p>\uc7ac\uc6b0\ub294 <a href=\"\/category\/detail\/3466\">\uc81c2\ud68c MatKor Cup<\/a>\uc5d0\uc11c <a href=\"\/problem\/27309\">\uc218\uc601 \uacfc\ubaa9\uc758 F\ub97c \ub9c9\uc9c0 \ubabb\ud574<\/a> \uacb0\uad6d \uc7ac\uc218\uac15\uc744 \ud558\uac8c \ub418\uc5c8\ub2e4. \uc7ac\uc6b0\ub294 \uc774\ubc88 \ud559\uae30\uc5d0\ub294 \uc131\uc2e4\ud788 \uc218\uc601 \uc218\uc5c5\uc5d0 \uc784\ud588\uace0, \uc774\uc81c \ucd5c\uc885 \ud3c9\uac00\ub9cc\uc744 \ub0a8\uaca8\ub450\uc5c8\ub2e4. \ucd5c\uc885 \ud3c9\uac00\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc9c4\ud589\ub41c\ub2e4.<\/p>\r\n\r\n<p>\uba3c\uc800 \uc218\uc601\uc7a5\uc744 2\ucc28\uc6d0 \uc88c\ud45c\uacc4\ub85c \ud45c\ud604\ud560 \uc218 \uc788\ub2e4. \uc218\uc601\uc7a5\uc740 \uc67c\ucabd \uc544\ub798\uc758 \uc810\uc744 $(0,0)$, \uc624\ub978\ucabd \uc704\uc758 \uc810\uc744 $(w,h)$\ub85c \ud558\ub294 \uac01 \ubcc0\uc774 $x$\ucd95 \ud639\uc740 $y$\ucd95\uacfc \ud3c9\ud589\ud55c \uc9c1\uc0ac\uac01\ud615\uc774\ub2e4. \uc5ec\uae30\uc11c &ldquo;\uc218\uc601 \uac00\ub2a5 \uc601\uc5ed&rdquo;\uc774\ub780 \uc9c1\uc0ac\uac01\ud615\uc758 \ub124 \ubcc0\uacfc \uadf8 \ubcc0\ub4e4\ub85c \ub458\ub7ec\uc2f8\uc778 \uc601\uc5ed\uc744 \uc758\ubbf8\ud55c\ub2e4.<\/p>\r\n\r\n<p>\uc218\uc601\uc7a5\uc5d0\ub294 $n$\uac1c\uc758 \ub808\uc778\uc774 \uc788\uace0, \uac01 \ub808\uc778\uc740 $x$\ucd95\uacfc \ud3c9\ud589\ud55c \uc120\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc788\ub2e4. \uad6c\uccb4\uc801\uc73c\ub85c, $0=a_0&lt;a_1&lt;a_2&lt;\\cdots &lt;a_n=h$\uc77c \ub54c, $i$\ubc88\uc9f8 \ub808\uc778\uc740 $a_{i-1}\\le y&lt;a_{i}$\uc778 \uad6c\uac04\uc774\ub2e4. \ub2e8, \ub9c8\uc9c0\ub9c9\uc778 $n$\ubc88\uc9f8 \ub808\uc778\uc740 $a_{n-1}\\le y\\le a_n$\uc778 \uad6c\uac04\uc73c\ub85c \uc815\uc758\ud55c\ub2e4.<\/p>\r\n\r\n<p>\uc774 \uc218\uc601\uc7a5\uc740 \ucd5c\ucca8\ub2e8 \uc2dc\uc2a4\ud15c\uc774 \uc801\uc6a9\ub418\uc5b4, \ub808\uc778\ubcc4\ub85c \ubb3c\uc758 \ubc00\ub3c4\uac00 \ub2e4\ub974\ub2e4. \ub530\ub77c\uc11c \uc7ac\uc6b0\uac00 \uc774\ub3d9\ud558\ub294 \uc18d\ub3c4\ub294 \uc5b4\ub5a4 \ub808\uc778\uc5d0\uc11c \uc218\uc601\ud558\ub290\ub0d0\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c4\ub2e4. \uad6c\uccb4\uc801\uc73c\ub85c $i$\ubc88\uc9f8 \ub808\uc778\uc758 \ubb3c\uc758 \ubc00\ub3c4\uac00 $p_i$\uc77c\ub54c, \uc7ac\uc6b0\ub294 $1$\ub9cc\ud07c\uc744 \uc774\ub3d9\ud558\ub294 \ub370 $p_i$\ucd08\uac00 \uc18c\uc694\ub41c\ub2e4. \uc774\ub54c, $x$\ucd95\uc5d0\uc11c \uba3c \ub808\uc778\uc77c\uc218\ub85d \ubb3c\uc758 \ubc00\ub3c4\ub294 \uac10\uc18c\ud55c\ub2e4. \uc989, $p_1&gt;p_2&gt;\\cdots &gt;p_n$\uc744 \ub9cc\uc871\ud55c\ub2e4.<\/p>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/7f31d06e-be9e-4d40-920a-b8f8c42f07b1\/-\/preview\/\" style=\"height: 265px; width: 400px;\" \/><\/p>\r\n\r\n<p>\uc7ac\uc6b0\ub294 \ucd5c\uc885 \ud3c9\uac00\ub97c \uc9c4\ud589\ud560 \ub54c $(0,0)$\uc5d0\uc11c \ucd9c\ubc1c\ud574 \uc218\uc601 \uac00\ub2a5 \uc601\uc5ed\uc5d0\uc11c \uc218\uc601\uc744 \ud1b5\ud574\uc11c\ub9cc \uc774\ub3d9\ud558\uc5ec \ub3c4\ucc29\uc810\uc5d0 \ub3c4\ucc29\ud574\uc57c \ud55c\ub2e4. \ub3c4\ucc29\uc810\uc740 $(w,d)$\ub85c \uc218\uc601\uc7a5\uc758 \uc624\ub978\ucabd \uc138\ub85c \ubcc0 \uc704\uc5d0 \uc788\ub2e4. \uc7ac\uc6b0\ub294 \ucd9c\ubc1c\uc810\uc5d0\uc11c \ucd9c\ubc1c\ud574\uc11c \ub3c4\ucc29\uc810\uc5d0 \ub3c4\ucc29\ud560 \ub54c\uae4c\uc9c0 \uac78\ub9ac\ub294 \ucd5c\ub2e8 \uc2dc\uac04\uc744 \uc54c\uace0 \uc2f6\ub2e4.<\/p>\r\n\r\n<p>\uc7ac\uc6b0\ub294 \uc218\uc601 \uac00\ub2a5 \uc601\uc5ed\uc5d0\uc11c <strong>\uc790\uc720\ub86d\uac8c<\/strong> \uc774\ub3d9\ud560 \uc218 \uc788\ub2e4\uace0 \ud560 \ub54c, \ub2f5\uc744 \uad6c\ud574\ubcf4\uc790.<\/p>\r\n","input":"<p>\uccab \ubc88\uc9f8 \uc904\uc5d0 \uc218\uc601\uc7a5\uc758 \uc624\ub978\ucabd \uc704\uc758 \uc810\uc744 \ub098\ud0c0\ub0b4\ub294 \uc815\uc218 $w$\uc640 $h$\uac00 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4. $(1\\le w,h\\le 1\\,000)$<\/p>\r\n\r\n<p>\ub450 \ubc88\uc9f8 \uc904\uc5d0 \ub808\uc778\uc758 \uac1c\uc218 $n$\uacfc \ub3c4\ucc29\uc810\uc758 $y$\uc88c\ud45c\ub97c \ub098\ud0c0\ub0b4\ub294 \uc815\uc218 $d$\uac00 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4. $(1\\le n\\le 1\\,000;$ $0\\le d\\le h)$<\/p>\r\n\r\n<p>\uc138 \ubc88\uc9f8 \uc904\uc5d0 \ub808\uc778\uc758 \uad6c\ubd84\uc744 \ub098\ud0c0\ub0b4\ub294 \uc815\uc218 $a_1$, $a_2$, $\\cdots$, $a_n$\uc774 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4. $(0&lt;a_1&lt;a_2&lt;\\cdots &lt;a_n=h)$<\/p>\r\n\r\n<p>\ub124 \ubc88\uc9f8 \uc904\uc5d0 \ub808\uc778\ubcc4 \ubb3c\uc758 \ubc00\ub3c4 $p_1$, $p_2$, $\\cdots$, $p_n$\uc774 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4. $(1\\le p_i\\le 1\\, 000;$ $p_1&gt;p_2&gt;\\cdots &gt;p_n)$<\/p>\r\n","output":"<p>\ub3c4\ucc29\uc810\uc5d0 \ub3c4\ucc29\ud558\uae30\uae4c\uc9c0 \uac78\ub9ac\ub294 \ucd5c\ub2e8 \uc2dc\uac04\uc744 \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n\r\n<p><strong>\uc815\ub2f5\uacfc\uc758 \uc808\ub300\uc624\ucc28 \ub610\ub294 \uc0c1\ub300\uc624\ucc28\uac00 $10^{-6}$ \uc774\ud558\uc774\uba74 \uc815\ub2f5\uc73c\ub85c \uc778\uc815\ub41c\ub2e4.<\/strong><\/p>\r\n","hint":"<p>\ub2e4\ud589\ud788\ub3c4 \uc7ac\uc6b0\ub294 \uc774\ubc88\uc5d0\ub294 \uc218\uc601 \uacfc\ubaa9\uc5d0\uc11c Pass\ub97c \ubc1b\uc558\ub2e4.<\/p>\r\n","original":"1","html_title":"0","problem_lang_tcode":"Korean","subtask1":"<p>$n = 1$<\/p>\r\n","subtask2":"<p>$n \\le 2;$ $d = h$<\/p>\r\n","subtask3":"<p>$n \\le 2$<\/p>\r\n","subtask4":"<p>$d = h$<\/p>\r\n","subtask5":"<p>\ucd94\uac00\uc801\uc778 \uc81c\ud55c \uc870\uac74 \uc5c6\uc74c<\/p>\r\n","sample_explain_1":"<p>\uc544\ub798 \uadf8\ub9bc\uc740 \uc815\ub2f5\uc774 \ub420 \uc218 \uc788\ub294 \uacbd\ub85c \uc911 \ud558\ub098\uc774\ub2e4. \uad6c\uccb4\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uacbd\ub85c\ub97c \uc9c0\ub098\uba70, \ucd1d \uc2dc\uac04\uc740 $10$\uc774\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>$(0,0)$   $(3,4)$: $\\sqrt{3^2+4^2} \\times 2 = 10$<\/li>\r\n<\/ul>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/175c29b3-f047-4f94-ae09-85cf8f57f3f9\/-\/preview\/\" style=\"height: 340px; width: 209px;\" \/><\/p>\r\n","sample_explain_2":"<p>\uc544\ub798 \uadf8\ub9bc\uc740 \uc815\ub2f5\uc774 \ub420 \uc218 \uc788\ub294 \uacbd\ub85c \uc911 \ud558\ub098\uc774\ub2e4. \uad6c\uccb4\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uacbd\ub85c\ub97c \uc9c0\ub098\uba70, \ucd1d \uc2dc\uac04\uc740 $20 + 30 = 50$\uc774\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>$(0,0)$   $(3,4)$: $\\sqrt{3^2+4^2} \\times 4 = 20$<\/li>\r\n\t<li>$(3,4)$   $(11,10)$: $\\sqrt{8^2+6^2} \\times 3 = 30$<\/li>\r\n<\/ul>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/7fdb8eb1-bffa-421c-b728-a71902fc194d\/-\/preview\/\" style=\"height: 257px; width: 300px;\" \/><\/p>\r\n","sample_explain_3":"<p>\uc544\ub798 \uadf8\ub9bc\uc740 \uc815\ub2f5\uc774 \ub420 \uc218 \uc788\ub294 \uacbd\ub85c \uc911 \ud558\ub098\uc774\ub2e4. \uad6c\uccb4\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uacbd\ub85c\ub97c \uc9c0\ub098\uba70, \ucd1d \uc2dc\uac04\uc740 $50+48+25=123$\uc774\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>$(0,0)$   $(6,8)$: $\\sqrt{6^2+8^2} \\times 5 = 50$<\/li>\r\n\t<li>$(6,8)$   $(22,8)$: $16 \\times 3 = 48$<\/li>\r\n\t<li>$(22,8)$   $(25,4)$: $\\sqrt{3^2+4^2} \\times 5 = 25$<\/li>\r\n<\/ul>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/ead7e7c5-a842-4605-bef9-022974813092\/-\/preview\/\" style=\"height: 172px; width: 400px;\" \/><\/p>\r\n"},{"problem_id":"31546","problem_lang":"1","title":"Jaewoo\u2019s Course Retake 2","description":"<blockquote>\r\n<p>This problem, compared to&nbsp;<a href=\"\/problem\/31535\">Jaewoo&rsquo;s Course Retake 1<\/a>, is the same except for the <strong>bold<\/strong> parts and&nbsp;the constraints of the problem.<\/p>\r\n<\/blockquote>\r\n\r\n<p>In <a href=\"\/category\/detail\/3466\">the 2nd MatKor Cup<\/a>, <a href=\"\/problem\/27309\">Jaewoo failed to prevent getting an F in the swimming subject<\/a>, so he retook the course again. Jaewoo, who faithfully attended the course this semester, is now left only with the final evaluation, which proceeds as follows.<\/p>\r\n\r\n<p>The swimming pool is represented in a coordinate plane. It is a rectangular shape, each line parallel to either the $x$-axis or the $y$-axis, with $(0,0)$ being its lower left point, and $(w,h)$ being its upper right point. The &quot;swim area&quot;&nbsp;is the area surrounded by the rectangle, including the four sides of it.<\/p>\r\n\r\n<p>There are $n$ lanes in the pool, each of which is divided by a line parallel to the $x$-axis. Specifically, when $0=a_0&lt;a_1&lt;a_2&lt;\\cdots &lt;a_n=h$, the $i$-th lane is a section where $a_{i-1}\\le y&lt;a_{i}$. This is except the $n$-th lane, which is defined as a section where $a_{n-1}\\le y\\le a_n$.<\/p>\r\n\r\n<p>This cutting-edge swimming pool has a different water density for each lane, so the speed of Jaewoo&rsquo;s movement in each section is different. Specifically, the water density in the $i$-th lane is $p_i$, making Jaewoo take $p_i$ seconds to move a distance of $1$. The farther the lane is from the $x$-axis, the lower the water density, namely, $p_1&gt;p_2&gt;\\cdots &gt;p_n$ holds.<\/p>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/7f31d06e-be9e-4d40-920a-b8f8c42f07b1\/-\/preview\/\" style=\"height: 265px; width: 400px;\" \/><\/p>\r\n\r\n<p>In the final evaluation, Jaewoo must start at $(0,0)$ and travel to the destination point only by swimming through the swim area. The coordinate of the destination point is $(w,d)$, which is on the right vertical side of the pool. Jaewoo wants to figure out the shortest time it takes to reach the destination from the starting point.<\/p>\r\n\r\n<p>Find the answer, given that Jaewoo can swim <b>freely<\/b> through the swim area.<\/p>\r\n","input":"<p>The first line contains two integers $w$ and $h$, separated by spaces $(1\\le w,h\\le 1\\,000)$ &ndash; the coordinates of the upper right point of the pool.<\/p>\r\n\r\n<p>The second line contains two integers $n$ and $d$, separated by spaces $(1\\le n\\le 1\\,000;$ $0\\le d\\le h)$ &ndash; the number of lanes and the $y$-coordinate of the destination point.<\/p>\r\n\r\n<p>The third line contains $n$ integers $a_1$, $a_2$, $\\cdots$, $a_n$, separated by spaces $(0&lt;a_1&lt;a_2&lt;\\cdots &lt;a_n=h)$ &ndash; the $y$-coordinates that divide the pool into $n$ lanes.<\/p>\r\n\r\n<p>The fourth line contains $n$ integers $p_1$, $p_2$, $\\cdots$, $p_n$, separated by spaces $(1\\le p_i\\le 1\\, 000;$ $p_1&gt;p_2&gt;\\cdots &gt;p_n)$ &ndash; the water density of each lane.<\/p>\r\n","output":"<p>Output the value of the minimum time to reach the destination point.<\/p>\r\n\r\n<p><strong>The output is considered as a correct answer if the absolute error or relative error with at least one of the possible correct answers is less than $10^{-6}$.<\/strong><\/p>\r\n","hint":"<p>Fortunately, Jaewoo passed the&nbsp;swimming course this semester.<\/p>\r\n","original":"0","html_title":"0","problem_lang_tcode":"English","subtask1":"<p>$n = 1$<\/p>\r\n","subtask2":"<p>$n \\le 2;$ $d = h$<\/p>\r\n","subtask3":"<p>$n \\le 2$<\/p>\r\n","subtask4":"<p>$d = h$<\/p>\r\n","subtask5":"<p>There are no additional restrictions.<\/p>\r\n","sample_explain_1":"<p>Below is one of the paths that can be the correct answer. The total time is $10$.<\/p>\r\n\r\n<ul>\r\n\t<li>$(0,0)$   $(3,4)$: $\\sqrt{3^2+4^2} \\times 2 = 10$<\/li>\r\n<\/ul>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/175c29b3-f047-4f94-ae09-85cf8f57f3f9\/-\/preview\/\" style=\"height: 340px; width: 209px;\" \/><\/p>\r\n","sample_explain_2":"<p>Below is one of the paths that can be the correct answer. The total time is $20 + 30 = 50$.<\/p>\r\n\r\n<ul>\r\n\t<li>$(0,0)$   $(3,4)$: $\\sqrt{3^2+4^2} \\times 4 = 20$<\/li>\r\n\t<li>$(3,4)$   $(11,10)$: $\\sqrt{8^2+6^2} \\times 3 = 30$<\/li>\r\n<\/ul>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/7fdb8eb1-bffa-421c-b728-a71902fc194d\/-\/preview\/\" style=\"height: 257px; width: 300px;\" \/><\/p>\r\n","sample_explain_3":"<p>Below is one of the paths that can be the correct answer. The total time is $50+48+25=123$.<\/p>\r\n\r\n<ul>\r\n\t<li>$(0,0)$   $(6,8)$: $\\sqrt{6^2+8^2} \\times 5 = 50$<\/li>\r\n\t<li>$(6,8)$   $(22,8)$: $16 \\times 3 = 48$<\/li>\r\n\t<li>$(22,8)$   $(25,4)$: $\\sqrt{3^2+4^2} \\times 5 = 25$<\/li>\r\n<\/ul>\r\n\r\n<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/upload.acmicpc.net\/ead7e7c5-a842-4605-bef9-022974813092\/-\/preview\/\" style=\"height: 172px; width: 400px;\" \/><\/p>\r\n"}]

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University > 고려대학교 > MatKor Cup > 제4회 고려대학교 MatKor Cup: 2024 Winter/Spring N번

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