시간 제한 메모리 제한 제출 정답 맞은 사람 정답 비율
3 초 128 MB 257 97 29 29.592%

문제

홍준이는 동아리에서 스터디장을 맡고 있다. 이 스터디에 오는 사람들의 주된 목표는 다 같이 모여서 공부를 하는 것이 아닌 모르는 것을 질문하는 것 이다. 홍준이도 이러한 점을 잘 알고 있다.

스터디에 있는 학생들의 능력을 두 개의 자연수 A와 B로 표현할 수 있다. A는 학생이 얼마나 잘 이해하고 있는지를 나타내고, B는 이 과목에 대한 학생의 지식의 깊이 정도를 나타낸다. 물론 값이 클 수록 이해를 더 잘하고, 지식의 깊이가 깊은 것을 의미한다.

스터디에 있는 학생은 자신 보다 이해를 못하거나, 지식의 깊이가 낮은 학생한테 질문하지 않는다. 하지만, 지식의 깊이가 같고, 자신보다 이해를 잘한 학생한테는 질문한다. 동시에 지식의 깊이 차이가 최소인 학생에게 질문하고 싶어한다. 만약 지식의 깊이 차이가 최소인 사람이 여러 명인 경우, 이해 정도의 차이가 최소인 사람한테 질문하고 싶어한다.

홍준이는 학생들의 이러한 성향을 매우 잘 파악하고 있고, 종종 학생들로부터 누구한테 질문하면 좋겠냐는 질문을 받는다. 홍준이를 도와 학생들의 질문에 대답해주는 프로그램을 작성하시오.

시간이 지남에 따라 동아리에 사람이 더 가입한다. 동아리를 탈퇴하는 사람은 없다.

입력

첫 줄에는 상황의 수 N이 주어진다. (1 ≤ N ≤ 200 000)

그 다음 N개의 줄에 다음과 같은 2가지 종류의 상황이 주어진다.

  • "D A B", 이해의 정도가 A이고, 지식의 깊이가 B인 학생이 동아리에 가입한다.
  • "P i", i번째로 가입한 학생이 누구한테 질문을 해야하는지 물어온다.

주어지는 수 A, B는 1이상, 2ㆍ10 9 이하다. 그리고 A, B가 동일한 학생은 존재하지 않는다.

출력

각 줄에 "P i"의 상황에 대한 답을 출력해야 한다. 만약 질문할 수 있는 학생이 존재하지 않는 경우 "NE"를 출력한다. 만약 i번째로 가입한 학생이 질문하는 학생이 k번째로 동아리에 가입했다면, 수 k를 출력한다.

예제 입력 1

6
D 3 1
D 2 2
D 1 3
P 1
P 2
P 3

예제 출력 1

NE
NE
NE
[{"problem_id":"3039","problem_lang":"0","title":"\uc2a4\ud130\ub514\uc7a5 \ud64d\uc900","description":"<p>\ud64d\uc900\uc774\ub294 \ub3d9\uc544\ub9ac\uc5d0\uc11c \uc2a4\ud130\ub514\uc7a5\uc744 \ub9e1\uace0 \uc788\ub2e4. \uc774 \uc2a4\ud130\ub514\uc5d0 \uc624\ub294 \uc0ac\ub78c\ub4e4\uc758 \uc8fc\ub41c \ubaa9\ud45c\ub294 \ub2e4 \uac19\uc774 \ubaa8\uc5ec\uc11c \uacf5\ubd80\ub97c \ud558\ub294 \uac83\uc774 \uc544\ub2cc \ubaa8\ub974\ub294 \uac83\uc744 \uc9c8\ubb38\ud558\ub294 \uac83 \uc774\ub2e4. \ud64d\uc900\uc774\ub3c4 \uc774\ub7ec\ud55c \uc810\uc744 \uc798 \uc54c\uace0 \uc788\ub2e4.<\/p>\r\n\r\n<p>\uc2a4\ud130\ub514\uc5d0 \uc788\ub294 \ud559\uc0dd\ub4e4\uc758 \ub2a5\ub825\uc744 \ub450 \uac1c\uc758&nbsp;\uc790\uc5f0\uc218 A\uc640 B\ub85c \ud45c\ud604\ud560 \uc218 \uc788\ub2e4. A\ub294 \ud559\uc0dd\uc774 \uc5bc\ub9c8\ub098 \uc798 \uc774\ud574\ud558\uace0 \uc788\ub294\uc9c0\ub97c \ub098\ud0c0\ub0b4\uace0, B\ub294 \uc774 \uacfc\ubaa9\uc5d0 \ub300\ud55c&nbsp;\ud559\uc0dd\uc758&nbsp;\uc9c0\uc2dd\uc758 \uae4a\uc774&nbsp;\uc815\ub3c4\ub97c \ub098\ud0c0\ub0b8\ub2e4. \ubb3c\ub860 \uac12\uc774 \ud074 \uc218\ub85d \uc774\ud574\ub97c \ub354 \uc798\ud558\uace0, \uc9c0\uc2dd\uc758&nbsp;\uae4a\uc774\uac00 \uae4a\uc740 \uac83\uc744 \uc758\ubbf8\ud55c\ub2e4.<\/p>\r\n\r\n<p>\uc2a4\ud130\ub514\uc5d0 \uc788\ub294 \ud559\uc0dd\uc740 \uc790\uc2e0 \ubcf4\ub2e4 \uc774\ud574\ub97c \ubabb\ud558\uac70\ub098, \uc9c0\uc2dd\uc758 \uae4a\uc774\uac00 \ub0ae\uc740 \ud559\uc0dd\ud55c\ud14c \uc9c8\ubb38\ud558\uc9c0 \uc54a\ub294\ub2e4. \ud558\uc9c0\ub9cc, \uc9c0\uc2dd\uc758 \uae4a\uc774\uac00 \uac19\uace0, \uc790\uc2e0\ubcf4\ub2e4 \uc774\ud574\ub97c \uc798\ud55c \ud559\uc0dd\ud55c\ud14c\ub294 \uc9c8\ubb38\ud55c\ub2e4. \ub3d9\uc2dc\uc5d0 \uc9c0\uc2dd\uc758 \uae4a\uc774 \ucc28\uc774\uac00 \ucd5c\uc18c\uc778 \ud559\uc0dd\uc5d0\uac8c \uc9c8\ubb38\ud558\uace0 \uc2f6\uc5b4\ud55c\ub2e4. \ub9cc\uc57d \uc9c0\uc2dd\uc758 \uae4a\uc774 \ucc28\uc774\uac00 \ucd5c\uc18c\uc778 \uc0ac\ub78c\uc774 \uc5ec\ub7ec \uba85\uc778 \uacbd\uc6b0, \uc774\ud574 \uc815\ub3c4\uc758 \ucc28\uc774\uac00 \ucd5c\uc18c\uc778 \uc0ac\ub78c\ud55c\ud14c \uc9c8\ubb38\ud558\uace0 \uc2f6\uc5b4\ud55c\ub2e4.<\/p>\r\n\r\n<p>\ud64d\uc900\uc774\ub294 \ud559\uc0dd\ub4e4\uc758 \uc774\ub7ec\ud55c \uc131\ud5a5\uc744 \ub9e4\uc6b0 \uc798 \ud30c\uc545\ud558\uace0 \uc788\uace0, \uc885\uc885 \ud559\uc0dd\ub4e4\ub85c\ubd80\ud130 \ub204\uad6c\ud55c\ud14c \uc9c8\ubb38\ud558\uba74 \uc88b\uaca0\ub0d0\ub294 \uc9c8\ubb38\uc744 \ubc1b\ub294\ub2e4. \ud64d\uc900\uc774\ub97c \ub3c4\uc640 \ud559\uc0dd\ub4e4\uc758 \uc9c8\ubb38\uc5d0 \ub300\ub2f5\ud574\uc8fc\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud558\uc2dc\uc624.<\/p>\r\n\r\n<p>\uc2dc\uac04\uc774 \uc9c0\ub0a8\uc5d0 \ub530\ub77c \ub3d9\uc544\ub9ac\uc5d0 \uc0ac\ub78c\uc774 \ub354 \uac00\uc785\ud55c\ub2e4. \ub3d9\uc544\ub9ac\ub97c \ud0c8\ud1f4\ud558\ub294 \uc0ac\ub78c\uc740 \uc5c6\ub2e4.<\/p>\r\n","input":"<p>\uccab \uc904\uc5d0\ub294 \uc0c1\ud669\uc758 \uc218 N\uc774 \uc8fc\uc5b4\uc9c4\ub2e4. (1 &le; N &le; 200 000)<\/p>\r\n\r\n<p>\uadf8&nbsp;\ub2e4\uc74c N\uac1c\uc758 \uc904\uc5d0 \ub2e4\uc74c\uacfc \uac19\uc740 2\uac00\uc9c0 \uc885\ub958\uc758 \uc0c1\ud669\uc774 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<ul>\r\n\t<li>&quot;D A B&quot;, \uc774\ud574\uc758 \uc815\ub3c4\uac00 A\uc774\uace0, \uc9c0\uc2dd\uc758 \uae4a\uc774\uac00 B\uc778 \ud559\uc0dd\uc774 \ub3d9\uc544\ub9ac\uc5d0 \uac00\uc785\ud55c\ub2e4.<\/li>\r\n\t<li>&quot;P i&quot;, i\ubc88\uc9f8\ub85c \uac00\uc785\ud55c \ud559\uc0dd\uc774 \ub204\uad6c\ud55c\ud14c \uc9c8\ubb38\uc744 \ud574\uc57c\ud558\ub294\uc9c0 \ubb3c\uc5b4\uc628\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n<p>\uc8fc\uc5b4\uc9c0\ub294 \uc218 A, B\ub294 1\uc774\uc0c1,&nbsp;2\u318d10 <sup>9<\/sup>&nbsp;\uc774\ud558\ub2e4. \uadf8\ub9ac\uace0 A, B\uac00 \ub3d9\uc77c\ud55c \ud559\uc0dd\uc740 \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294\ub2e4.<\/p>\r\n","output":"<p>\uac01 \uc904\uc5d0&nbsp;&quot;P i&quot;\uc758 \uc0c1\ud669\uc5d0 \ub300\ud55c \ub2f5\uc744 \ucd9c\ub825\ud574\uc57c \ud55c\ub2e4. \ub9cc\uc57d \uc9c8\ubb38\ud560 \uc218 \uc788\ub294 \ud559\uc0dd\uc774 \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294 \uacbd\uc6b0 &quot;NE&quot;\ub97c \ucd9c\ub825\ud55c\ub2e4. \ub9cc\uc57d i\ubc88\uc9f8\ub85c \uac00\uc785\ud55c \ud559\uc0dd\uc774 \uc9c8\ubb38\ud558\ub294 \ud559\uc0dd\uc774 k\ubc88\uc9f8\ub85c \ub3d9\uc544\ub9ac\uc5d0 \uac00\uc785\ud588\ub2e4\uba74, \uc218 k\ub97c \ucd9c\ub825\ud55c\ub2e4.<\/p>\r\n","hint":"","original":"0","problem_lang_code":"\ud55c\uad6d\uc5b4"},{"problem_id":"3039","problem_lang":"1","title":"ISPITI","description":"<p>It&#39;s exam time in Mirko&#39;s village. Everyone wants to pass the exam with as little effort as possible, which is not easy. Mirko realized that it would be best for him to find someone who knows more than him and learn from them. Everyone followed and now everyone is looking for someone to learn from.&nbsp;<\/p>\r\n\r\n<p>We can model how well a student is prepared for the exam with two integers, A and B. The number A represents how well a student understands the subject, while the number B is proportional to the quantity of their knowledge.&nbsp;<\/p>\r\n\r\n<p>As the head of the village, Mirko decided that a student will ask another student for help only if that student has both numbers greater than or equal to the first student&#39;s numbers (no student will ask someone who doesn&#39;t understand the subject as well as themselves or who knows less).&nbsp;<\/p>\r\n\r\n<p>Additionally, students will try to minimize the difference in knowledge quantity (so that students don&#39;t bother those that are way better). If this choice is not unique, they will try to minimize the difference in understanding.&nbsp;<\/p>\r\n\r\n<p>Mirko&#39;s village has recently become a very popular suburb and new students keep moving in (in time for the exam). With Mirko&#39;s strict rules, they get confused about Mirko&#39;s rules and don&#39;t know where to go). They decided to ask a programmer from a neighbouring village for help.&nbsp;<\/p>\r\n","input":"<p>The first line of input contains an integer N (1 &le; N &le; 200 000), the number of queries and arrivals in the village. Each of the following N lines contains either:&nbsp;<\/p>\r\n\r\n<ul>\r\n\t<li>&quot;D A B&quot;, a student has moved in whose knowledge is A and B<\/li>\r\n\t<li>&quot;P i&quot;, the i-th student to move in wants to know whom to ask for help&nbsp;<\/li>\r\n<\/ul>\r\n\r\n<p>The numbers A and B are between 1 and 2&middot;10<sup>9<\/sup>. No two students have both numbers equal.&nbsp;<\/p>\r\n","output":"<p>For each query (&quot;P i&quot; line), output which student the i-th student should ask for help. The students are numbered in the order they moved into the village (starting from 1). If a student cannot be helped, output &quot;NE&quot;.&nbsp;<\/p>\r\n","hint":"","original":"1","problem_lang_code":"\uc601\uc5b4"}]