시간 제한 메모리 제한 제출 정답 맞은 사람 정답 비율
1 초 128 MB 8 4 2 40.000%

문제

재현이는 얼마 전 토너먼트 형태의 양궁 대회를 열었다. 1번부터 N번까지 번호가 매겨진 N개의 표적이 일직선상에 순서대로 (가장 좌측에 1번부터 시작하여 오른쪽에 N번으로 끝난다.) 나열되어 있으며, 2*N 명의 궁수들이 있다.

토너먼트는 다음과 같이 진행된다 - 한 표적에는 항상 2명의 궁수들이 할당되어 있으며, 두 궁수는 한 표적을 두고 경쟁하며 승자와 패자를 가른다. 승자와 패자가 결정된 후에는, 2 ~ N 표적에서 승리한 궁수들이 왼쪽 표적으로 이동하며 (1 ~ N-1 표적으로), 2 ~ N 표적에서 패배한 궁수들은 그 자리에 머무른다. 이때 1번 표적에서 승리한 궁수는 그 자리에 머무르며, 1번 표적에서 패배한 궁수는 N번째 표적으로 이동한다. 이 토너먼트는 R번 진행되며, R >= 2*N임이 보장된다.

경험있는 양궁 해설가 승원이는 자신을 포함에서 이번에 출전하는 양궁 선수의 실력 등급을 모두 알고 있다. 각 선수의 실력 등급은 1 ~ 2*N 까지의 수로 표시되며, 등급이 낮은 선수일수록 뛰어난 선수이다. 승원이의 이 데이터는 정말 정확해서, 항상 실력이 높은 선수가 실력이 낮은 선수를 이긴다는 사실을 보장할 수 있다. 승원이는 양궁 해설에 타고난 재능을 가지고 있지만 이상하게 양궁 자체에는 별 관심이 없어서, 이번 대회에서 이기는 것보다는 오늘 밤 있는 코드포스 라운드를 놓치지 않는 것에 더 관심이 있다. 출구는 맨 왼쪽에 있기 때문에, 승원이는 R번의 라운드가 끝나고 나서 가장 왼쪽 타겟에 서 있기를 원한다.

다행이도, 승원이를 제외한 2*N-1명의 궁수가 연습을 위해 일찍 대회장에 나와있었다. 승원이는 적절한 위치에 끼어들어가서 양궁 경기를 시작하려 한다. 과연 승원이는 어떠한 위치에 끼어들어가야지 가장 일찍 집에 들어갈 수 있을까?

입력

표준 입력으로부터 다음의 데이터를 읽어야 한다 :

  • 첫 번째 줄에 N과 R이 주어진다.
  • 두 번째 줄에는 승원이의 실력 등급이 주어진다.
  • 세 번째 줄 이후 2*N-1개의 줄에 각 선수의 실력 등급이 주어진다. 현재 선수들은 주어지는 순서대로 왼쪽에서 오른쪽으로 서 있다. 즉 세 번째 줄에 적혀있는 선수가 가장 왼쪽에 있으며, 2*N+1번째 줄에 적혀있는 선수가 가장 오른쪽에 있다. 실력 등급은 2*N 보다 작거나 같은 서로 다른 자연수이다.
  • 1 <= N <= 200000
  • 2*N <= R <= 1,000,000,000

출력

승원이가 집에 일찍 들어가기 위해 끼어들어가야 할 위치를 출력한다. 이때 위치는, 승원이가 처음 경쟁할 때 삼을 표적의 번호를 뜻한다. 만약에 최적의 위치가 여러 곳이라면, 그 중 가장 번호가 높은 위치를 출력하면 된다.

예제 입력 1

4 8
7
4
2
6
5
8
1
3

예제 출력 1

3

예제 입력 2

4 9
2
1
5
8
3
4
7
6

예제 출력 2

2

힌트

승원이의 실력 등급은 7이다. 1번 표적에서 시작할 경우 승원이는 4번 표적으로 간 후 끝까지 해당 표적에 머무른다. 2번 표적이나 4번 표적에서 시작할 경우 승원이는 끝까지 해당 표적에 머무른다. 3번 표적에서 시작할 경우 승원이는 실력 등급이 8인 궁수를 이기고 2번 표적에 끝까지 머무른다.

[{"problem_id":"5460","problem_lang":"0","title":"\uc591\uad81","description":"<p>\uc7ac\ud604\uc774\ub294 \uc5bc\ub9c8 \uc804 \ud1a0\ub108\uba3c\ud2b8 \ud615\ud0dc\uc758 \uc591\uad81 \ub300\ud68c\ub97c \uc5f4\uc5c8\ub2e4. 1\ubc88\ubd80\ud130 N\ubc88\uae4c\uc9c0 \ubc88\ud638\uac00 \ub9e4\uaca8\uc9c4 N\uac1c\uc758 \ud45c\uc801\uc774 \uc77c\uc9c1\uc120\uc0c1\uc5d0 \uc21c\uc11c\ub300\ub85c (\uac00\uc7a5 \uc88c\uce21\uc5d0 1\ubc88\ubd80\ud130 \uc2dc\uc791\ud558\uc5ec \uc624\ub978\ucabd\uc5d0 N\ubc88\uc73c\ub85c \ub05d\ub09c\ub2e4.) \ub098\uc5f4\ub418\uc5b4 \uc788\uc73c\uba70, 2*N \uba85\uc758 \uad81\uc218\ub4e4\uc774 \uc788\ub2e4.<\/p>\r\n\r\n<p>\ud1a0\ub108\uba3c\ud2b8\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc9c4\ud589\ub41c\ub2e4 - \ud55c \ud45c\uc801\uc5d0\ub294 \ud56d\uc0c1 2\uba85\uc758 \uad81\uc218\ub4e4\uc774 \ud560\ub2f9\ub418\uc5b4 \uc788\uc73c\uba70, \ub450 \uad81\uc218\ub294 \ud55c \ud45c\uc801\uc744 \ub450\uace0 \uacbd\uc7c1\ud558\uba70 \uc2b9\uc790\uc640 \ud328\uc790\ub97c \uac00\ub978\ub2e4. \uc2b9\uc790\uc640 \ud328\uc790\uac00 \uacb0\uc815\ub41c \ud6c4\uc5d0\ub294, 2 ~ N \ud45c\uc801\uc5d0\uc11c \uc2b9\ub9ac\ud55c \uad81\uc218\ub4e4\uc774 \uc67c\ucabd \ud45c\uc801\uc73c\ub85c \uc774\ub3d9\ud558\uba70 (1 ~ N-1 \ud45c\uc801\uc73c\ub85c), 2 ~ N \ud45c\uc801\uc5d0\uc11c \ud328\ubc30\ud55c \uad81\uc218\ub4e4\uc740 \uadf8 \uc790\ub9ac\uc5d0 \uba38\ubb34\ub978\ub2e4. \uc774\ub54c 1\ubc88 \ud45c\uc801\uc5d0\uc11c \uc2b9\ub9ac\ud55c \uad81\uc218\ub294 \uadf8 \uc790\ub9ac\uc5d0 \uba38\ubb34\ub974\uba70, 1\ubc88 \ud45c\uc801\uc5d0\uc11c \ud328\ubc30\ud55c \uad81\uc218\ub294 N\ubc88\uc9f8 \ud45c\uc801\uc73c\ub85c \uc774\ub3d9\ud55c\ub2e4. \uc774 \ud1a0\ub108\uba3c\ud2b8\ub294 R\ubc88 \uc9c4\ud589\ub418\uba70, R &gt;= 2*N\uc784\uc774 \ubcf4\uc7a5\ub41c\ub2e4.<\/p>\r\n\r\n<p>\uacbd\ud5d8\uc788\ub294 \uc591\uad81 \ud574\uc124\uac00 \uc2b9\uc6d0\uc774\ub294 \uc790\uc2e0\uc744 \ud3ec\ud568\uc5d0\uc11c \uc774\ubc88\uc5d0 \ucd9c\uc804\ud558\ub294 \uc591\uad81 \uc120\uc218\uc758 \uc2e4\ub825 \ub4f1\uae09\uc744 \ubaa8\ub450 \uc54c\uace0 \uc788\ub2e4. \uac01 \uc120\uc218\uc758 \uc2e4\ub825 \ub4f1\uae09\uc740 1 ~ 2*N \uae4c\uc9c0\uc758 \uc218\ub85c \ud45c\uc2dc\ub418\uba70, \ub4f1\uae09\uc774 \ub0ae\uc740 \uc120\uc218\uc77c\uc218\ub85d \ub6f0\uc5b4\ub09c \uc120\uc218\uc774\ub2e4. \uc2b9\uc6d0\uc774\uc758 \uc774 \ub370\uc774\ud130\ub294 \uc815\ub9d0 \uc815\ud655\ud574\uc11c, \ud56d\uc0c1 \uc2e4\ub825\uc774 \ub192\uc740 \uc120\uc218\uac00 \uc2e4\ub825\uc774 \ub0ae\uc740 \uc120\uc218\ub97c \uc774\uae34\ub2e4\ub294 \uc0ac\uc2e4\uc744 \ubcf4\uc7a5\ud560 \uc218 \uc788\ub2e4. \uc2b9\uc6d0\uc774\ub294 \uc591\uad81 \ud574\uc124\uc5d0 \ud0c0\uace0\ub09c \uc7ac\ub2a5\uc744 \uac00\uc9c0\uace0 \uc788\uc9c0\ub9cc \uc774\uc0c1\ud558\uac8c \uc591\uad81 \uc790\uccb4\uc5d0\ub294 \ubcc4 \uad00\uc2ec\uc774 \uc5c6\uc5b4\uc11c, \uc774\ubc88 \ub300\ud68c\uc5d0\uc11c \uc774\uae30\ub294 \uac83\ubcf4\ub2e4\ub294 \uc624\ub298 \ubc24 \uc788\ub294 \ucf54\ub4dc\ud3ec\uc2a4 \ub77c\uc6b4\ub4dc\ub97c \ub193\uce58\uc9c0 \uc54a\ub294 \uac83\uc5d0 \ub354 \uad00\uc2ec\uc774 \uc788\ub2e4. \ucd9c\uad6c\ub294 \ub9e8 \uc67c\ucabd\uc5d0 \uc788\uae30 \ub54c\ubb38\uc5d0, \uc2b9\uc6d0\uc774\ub294 R\ubc88\uc758 \ub77c\uc6b4\ub4dc\uac00 \ub05d\ub098\uace0 \ub098\uc11c \uac00\uc7a5 \uc67c\ucabd \ud0c0\uac9f\uc5d0 \uc11c \uc788\uae30\ub97c \uc6d0\ud55c\ub2e4.<\/p>\r\n\r\n<p>\ub2e4\ud589\uc774\ub3c4, \uc2b9\uc6d0\uc774\ub97c \uc81c\uc678\ud55c 2*N-1\uba85\uc758 \uad81\uc218\uac00 \uc5f0\uc2b5\uc744 \uc704\ud574 \uc77c\ucc0d \ub300\ud68c\uc7a5\uc5d0 \ub098\uc640\uc788\uc5c8\ub2e4. \uc2b9\uc6d0\uc774\ub294 \uc801\uc808\ud55c \uc704\uce58\uc5d0 \ub07c\uc5b4\ub4e4\uc5b4\uac00\uc11c \uc591\uad81 \uacbd\uae30\ub97c \uc2dc\uc791\ud558\ub824 \ud55c\ub2e4. \uacfc\uc5f0 \uc2b9\uc6d0\uc774\ub294 \uc5b4\ub5a0\ud55c \uc704\uce58\uc5d0 \ub07c\uc5b4\ub4e4\uc5b4\uac00\uc57c\uc9c0 \uac00\uc7a5 \uc77c\ucc0d \uc9d1\uc5d0 \ub4e4\uc5b4\uac08 \uc218 \uc788\uc744\uae4c?<\/p>\r\n","input":"<p>\ud45c\uc900 \uc785\ub825\uc73c\ub85c\ubd80\ud130 \ub2e4\uc74c\uc758 \ub370\uc774\ud130\ub97c \uc77d\uc5b4\uc57c \ud55c\ub2e4 :<\/p>\r\n\r\n<ul>\r\n\t<li>\uccab \ubc88\uc9f8 \uc904\uc5d0 N\uacfc R\uc774 \uc8fc\uc5b4\uc9c4\ub2e4.<\/li>\r\n\t<li>\ub450 \ubc88\uc9f8 \uc904\uc5d0\ub294 \uc2b9\uc6d0\uc774\uc758 \uc2e4\ub825 \ub4f1\uae09\uc774 \uc8fc\uc5b4\uc9c4\ub2e4.<\/li>\r\n\t<li>\uc138 \ubc88\uc9f8 \uc904 \uc774\ud6c4 2*N-1\uac1c\uc758 \uc904\uc5d0 \uac01 \uc120\uc218\uc758 \uc2e4\ub825 \ub4f1\uae09\uc774 \uc8fc\uc5b4\uc9c4\ub2e4. \ud604\uc7ac \uc120\uc218\ub4e4\uc740 \uc8fc\uc5b4\uc9c0\ub294 \uc21c\uc11c\ub300\ub85c \uc67c\ucabd\uc5d0\uc11c \uc624\ub978\ucabd\uc73c\ub85c \uc11c \uc788\ub2e4. \uc989 \uc138 \ubc88\uc9f8 \uc904\uc5d0 \uc801\ud600\uc788\ub294 \uc120\uc218\uac00 \uac00\uc7a5 \uc67c\ucabd\uc5d0 \uc788\uc73c\uba70, 2*N+1\ubc88\uc9f8 \uc904\uc5d0 \uc801\ud600\uc788\ub294 \uc120\uc218\uac00 \uac00\uc7a5 \uc624\ub978\ucabd\uc5d0 \uc788\ub2e4. \uc2e4\ub825 \ub4f1\uae09\uc740 2*N \ubcf4\ub2e4 \uc791\uac70\ub098 \uac19\uc740 \uc11c\ub85c \ub2e4\ub978 \uc790\uc5f0\uc218\uc774\ub2e4.<\/li>\r\n\t<li>1 &lt;= N &lt;= 200000<\/li>\r\n\t<li>2*N &lt;= R &lt;= 1,000,000,000<\/li>\r\n<\/ul>\r\n","output":"<p>\uc2b9\uc6d0\uc774\uac00 \uc9d1\uc5d0 \uc77c\ucc0d \ub4e4\uc5b4\uac00\uae30 \uc704\ud574 \ub07c\uc5b4\ub4e4\uc5b4\uac00\uc57c \ud560 \uc704\uce58\ub97c \ucd9c\ub825\ud55c\ub2e4. \uc774\ub54c \uc704\uce58\ub294, \uc2b9\uc6d0\uc774\uac00 \ucc98\uc74c \uacbd\uc7c1\ud560 \ub54c \uc0bc\uc744 \ud45c\uc801\uc758 \ubc88\ud638\ub97c \ub73b\ud55c\ub2e4. \ub9cc\uc57d\uc5d0 \ucd5c\uc801\uc758 \uc704\uce58\uac00 \uc5ec\ub7ec \uacf3\uc774\ub77c\uba74, \uadf8 \uc911 \uac00\uc7a5 \ubc88\ud638\uac00 \ub192\uc740 \uc704\uce58\ub97c \ucd9c\ub825\ud558\uba74 \ub41c\ub2e4.<\/p>\r\n","hint":"<p>\uc2b9\uc6d0\uc774\uc758 \uc2e4\ub825 \ub4f1\uae09\uc740 7\uc774\ub2e4. 1\ubc88 \ud45c\uc801\uc5d0\uc11c \uc2dc\uc791\ud560 \uacbd\uc6b0 \uc2b9\uc6d0\uc774\ub294 4\ubc88 \ud45c\uc801\uc73c\ub85c \uac04 \ud6c4 \ub05d\uae4c\uc9c0 \ud574\ub2f9 \ud45c\uc801\uc5d0 \uba38\ubb34\ub978\ub2e4. 2\ubc88 \ud45c\uc801\uc774\ub098 4\ubc88 \ud45c\uc801\uc5d0\uc11c \uc2dc\uc791\ud560 \uacbd\uc6b0 \uc2b9\uc6d0\uc774\ub294 \ub05d\uae4c\uc9c0 \ud574\ub2f9 \ud45c\uc801\uc5d0 \uba38\ubb34\ub978\ub2e4. 3\ubc88 \ud45c\uc801\uc5d0\uc11c \uc2dc\uc791\ud560 \uacbd\uc6b0 \uc2b9\uc6d0\uc774\ub294 \uc2e4\ub825 \ub4f1\uae09\uc774 8\uc778 \uad81\uc218\ub97c \uc774\uae30\uace0 2\ubc88 \ud45c\uc801\uc5d0 \ub05d\uae4c\uc9c0 \uba38\ubb34\ub978\ub2e4.<\/p>\r\n","original":"0","problem_lang_code":"\ud55c\uad6d\uc5b4"},{"problem_id":"5460","problem_lang":"1","title":"Archery","description":"<p>An archery tournament is held according to the following rules. There are N targets arranged in a line and numbered from 1 to N inclusive according to their place on the line (the leftmost target being target 1, and the rightmost target being target N). There are also 2*N archers. At any time during the tournament, there are two archers on each target. Every round of the tournament goes according to the following procedure:<\/p>\r\n\r\n<ul>\r\n\t<li>The two archers on each target compete with each other and determine a winner and a loser between them. Then all archers are rearranged as follows:\r\n\t<ul>\r\n\t\t<li>The winners on targets 2 to N inclusive move to the target on their left (i.e., targets 1 to N - 1 respectively).<\/li>\r\n\t\t<li>The losers on targets 2 to N inclusive, as well as the winner on target 1, remain on the same target.<\/li>\r\n\t\t<li>The loser on target 1 moves to target N.<\/li>\r\n\t<\/ul>\r\n\t<\/li>\r\n<\/ul>\r\n\r\n<p>The tournament continues for R rounds, with the number of rounds being at least as many as the number of archers (i.e., R &ge; 2*N).<\/p>\r\n\r\n<p>You are the only archer to arrive for the tournament exactly on time. All other 2*N - 1 archers have arrived early and are already standing in a line. What you have to do now is to insert yourself somewhere into the line amongst them. You know that after you take your position, the two leftmost archers in the line will start the tournament on target 1, the next two will start on target 2 and so on, with the two rightmost archers starting on target N.<\/p>\r\n\r\n<p>All the 2*N archers in the tournament (including yourself) are ranked by skill, where a smaller rank corresponds to better skill. No two archers have the same rank. Also, whenever two archers compete, the one with the smaller rank will always win.<\/p>\r\n\r\n<p>Knowing how skilled each of your competitors is, you want to insert yourself in such a way as to ensure that you will finish the tournament on a target with as small a number as possible. If there are multiple ways to do this, you prefer the one that starts at a target with as large a number as possible.&nbsp;<\/p>\r\n\r\n<p>Write a program that, given the ranks of all archers, including yourself, as well as your competitors&rsquo; arrangement on the line, determines on which target you should start the tournament, so that you can achieve your goals as defined above.&nbsp;<\/p>\r\n","input":"<p>Your program must read from standard input the following data:<\/p>\r\n\r\n<ul>\r\n\t<li>The first line contains the integers N and R, separated by a space.<\/li>\r\n\t<li>The next 2*N lines list the ranks of the archers. The first of these lines contains your rank. The rest of these lines contain the ranks of the other archers, one archer per line, in the order in which they have arranged themselves (from left to right). Each of these 2*N lines contains a single integer between 1 and 2*N inclusive. A rank of 1 is the best and a rank of 2*N is the worst. No two archers have the same rank.<\/li>\r\n<\/ul>\r\n\r\n<ul>\r\n\t<li>1 &le; N &le; 200,000 The number of targets; also equal to half the number of archers<\/li>\r\n\t<li>2*N &le; R &le; 1,000,000,000 The number of tournament rounds<\/li>\r\n\t<li>1 &le; Sk &le; 2*N The rank of archer k<\/li>\r\n<\/ul>\r\n","output":"<p>Your program must write to standard output a single line containing a single integer between 1 and N inclusive: the number of the target on which you will start the tournament.&nbsp;<\/p>\r\n","hint":"<p>Sample 1<\/p>\r\n\r\n<p>You are the second worst archer. If you start on target 1, you will then go to target 4 and stay there until the end. If you start on target 2 or 4, you will just stay there for the whole tournament. If you start on target 3, you will beat the worst archer and then move to target 2 and stay there.&nbsp;<\/p>\r\n\r\n<p>Sample 2<\/p>\r\n\r\n<p>You are the second best archer. The best one is already on target 1 and will stay there for the whole duration of the tournament. Thus, no matter where you start, you will always move from your target, going through all targets from 4 to 1 over and over again. In order for you to end on target 1 after 9 transitions, you have to start on target 2.&nbsp;<\/p>\r\n","original":"1","problem_lang_code":"\uc601\uc5b4"}]

출처

Olympiad > International Olympiad in Informatics > IOI 2009 1번

  • 문제를 번역한 사람: koosaga
  • 문제의 오타를 찾은 사람: sky1357