시간 제한 메모리 제한 제출 정답 맞은 사람 정답 비율
1 초 (언어별 추가 시간 없음) 1024 MB 169 28 16 47.059%

문제

사진: 풍선으로 하늘에 띄운 집. 2018 KAIST RUN Spring Contest 포스터에도 사용된 사진이다.

서기 2117년, 유재민 교수에 의해 TSP (Traveling Salesperson Problem)의 선형시간 알고리즘이 개발되었다. 얼마 가지 않아 모든 컴퓨터 시스템은 붕괴되었고, 세상은 핵무기로 인해 황폐화 되었다. 컴퓨터 과학의 최고 전문가이던 당신 역시도 할 일을 잃게 되었고, 절망 속에 인생의 의미를 잃어버린 지 오래다. 과연 그동안 당신의 심장을 뛰게 하던 모든 것들은 어디로 갔을까? 끝없이 자신에게 질문한 끝에 내린 결론은...

"ICPC를 처음 시작한 그 때 그 카이스트를 가면, 내 인생의 의미를 찾을 수 있지 않을까?"

도로망이나 철도는 모두 황폐화된지 오래이다. 그렇지만 열렬한 ICPC 참가자였던 당신은 100년 전 대전 대회에서 받았던 풍선을 여전히 가지고 있다. 만약 그 풍선으로 집을 띄울 수만 있다면...

현재 당신에게는 N개의 풍선이 있고, 당신은 풍선을 하나씩 지붕에 매달아서 집을 하늘로 띄우려 한다. 각각의 풍선은 고도 제한 Li와 용량 Di가 있는데, 이는 기압의 영향으로 인하여 고도 Li 이하에서만 이 풍선을 불 수 있고, 이 풍선은 고도를 Di만큼 상승시킨 후 터진다는 것을 뜻한다.

당신의 여정은 고도 0에서 출발한다. 부풀어 있는 풍선이 2개 이상이면 집이 너무 빠른 속도로 상승할 수 있으니, 당신은 하나의 풍선을 불어서 지붕에 매단 후, 풍선이 터질 때가지 고도를 상승시키고, 터진 이후에 또 하나의 풍선을 불어서 터질 때까지 고도를 상승시키는 것을 반복해서 집을 띄울 예정이다. 편의상 터진 이후 풍선을 매다는 동안의 고도 변화는 없다고 가정한다. (즉, 풍선만이 유일하게 고도를 바꿀 수 있다.)

최종 고도는 어느 위치던 간에 상관 없으나, 하나의 풍선은 터지기 전 까지 일정한 거리를 움직일 수 있으니, 최대한 많은 풍선을 터뜨리는 것이 좋다. 고로 당신은 터뜨릴 수 있는 풍선의 최대 개수를 계산한 후, 정말 KAIST로의 여행을 떠날 수 있는지를 계산해 보려고 한다. 100년 전의 ICPC 경험이, 이 문제를 해결하는 데 정말 도움을 줄 수 있을까?

입력

첫 번째 줄에 풍선의 개수 N이 주어진다.

이후 N개의 줄의 i번째 줄에는 풍선의 고도 제한 Li와 풍선의 용량 Di를 의미하는 정수 2개가 공백으로 구분되어 주어진다.

출력

터뜨릴 수 있는 풍선의 최대 개수를 출력하여라.

제한

  • 1 ≤ N ≤ 250,000
  • 0 ≤ Li ≤ 1015
  • 1 ≤ Di ≤ 109

서브태스크 1 (22점)

이 서브태스크는 다음의 조건을 만족한다.:

  • N ≤ 20

서브태스크 2 (33점)

이 서브태스크는 다음의 조건을 만족한다.:

  • N ≤ 5,000

서브태스크 3 (45점)

이 서브태스크는 추가 제한 조건이 없다.

예제 입력 1

3
1 4
1 5
9 2

예제 출력 1

2

예제 입력 2

4
0 1
0 2
0 3
0 4

예제 출력 2

1
[{"problem_id":"15773","problem_lang":"0","title":"Touch The Sky","description":"<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/onlinejudgeimages.s3-ap-northeast-1.amazonaws.com\/problem\/15773\/touch.jpg\" style=\"width: 675px; height: 450px;\" \/><\/p>\r\n\r\n<p style=\"text-align: center;\">\uc0ac\uc9c4: \ud48d\uc120\uc73c\ub85c \ud558\ub298\uc5d0 \ub744\uc6b4 \uc9d1. 2018 KAIST RUN Spring Contest \ud3ec\uc2a4\ud130\uc5d0\ub3c4 \uc0ac\uc6a9\ub41c \uc0ac\uc9c4\uc774\ub2e4.<\/p>\r\n\r\n<p>\uc11c\uae30 2117\ub144, \uc720\uc7ac\ubbfc \uad50\uc218\uc5d0 \uc758\ud574 TSP (Traveling Salesperson Problem)\uc758 \uc120\ud615\uc2dc\uac04 \uc54c\uace0\ub9ac\uc998\uc774 \uac1c\ubc1c\ub418\uc5c8\ub2e4. \uc5bc\ub9c8 \uac00\uc9c0 \uc54a\uc544 \ubaa8\ub4e0 \ucef4\ud4e8\ud130 \uc2dc\uc2a4\ud15c\uc740 \ubd95\uad34\ub418\uc5c8\uace0, \uc138\uc0c1\uc740 \ud575\ubb34\uae30\ub85c \uc778\ud574 \ud669\ud3d0\ud654 \ub418\uc5c8\ub2e4. \ucef4\ud4e8\ud130 \uacfc\ud559\uc758 \ucd5c\uace0 \uc804\ubb38\uac00\uc774\ub358 \ub2f9\uc2e0 \uc5ed\uc2dc\ub3c4 \ud560 \uc77c\uc744 \uc783\uac8c \ub418\uc5c8\uace0, \uc808\ub9dd \uc18d\uc5d0 \uc778\uc0dd\uc758 \uc758\ubbf8\ub97c \uc783\uc5b4\ubc84\ub9b0 \uc9c0 \uc624\ub798\ub2e4. \uacfc\uc5f0 \uadf8\ub3d9\uc548 \ub2f9\uc2e0\uc758 \uc2ec\uc7a5\uc744 \ub6f0\uac8c \ud558\ub358 \ubaa8\ub4e0 \uac83\ub4e4\uc740 \uc5b4\ub514\ub85c \uac14\uc744\uae4c? \ub05d\uc5c6\uc774 \uc790\uc2e0\uc5d0\uac8c \uc9c8\ubb38\ud55c \ub05d\uc5d0 \ub0b4\ub9b0 \uacb0\ub860\uc740...<\/p>\r\n\r\n<p><em>&quot;ICPC\ub97c \ucc98\uc74c \uc2dc\uc791\ud55c \uadf8 \ub54c \uadf8 \uce74\uc774\uc2a4\ud2b8\ub97c \uac00\uba74, \ub0b4 \uc778\uc0dd\uc758 \uc758\ubbf8\ub97c \ucc3e\uc744 \uc218 \uc788\uc9c0 \uc54a\uc744\uae4c?&quot;<\/em><\/p>\r\n\r\n<p>\ub3c4\ub85c\ub9dd\uc774\ub098 \ucca0\ub3c4\ub294 \ubaa8\ub450 \ud669\ud3d0\ud654\ub41c\uc9c0 \uc624\ub798\uc774\ub2e4. \uadf8\ub807\uc9c0\ub9cc \uc5f4\ub82c\ud55c ICPC \ucc38\uac00\uc790\uc600\ub358 \ub2f9\uc2e0\uc740 100\ub144 \uc804 \ub300\uc804 \ub300\ud68c\uc5d0\uc11c \ubc1b\uc558\ub358 \ud48d\uc120\uc744 \uc5ec\uc804\ud788 \uac00\uc9c0\uace0 \uc788\ub2e4. \ub9cc\uc57d \uadf8 \ud48d\uc120\uc73c\ub85c \uc9d1\uc744 \ub744\uc6b8 \uc218\ub9cc \uc788\ub2e4\uba74...<\/p>\r\n\r\n<p>\ud604\uc7ac \ub2f9\uc2e0\uc5d0\uac8c\ub294 <em>N<\/em>\uac1c\uc758 \ud48d\uc120\uc774 \uc788\uace0, \ub2f9\uc2e0\uc740 \ud48d\uc120\uc744 \ud558\ub098\uc529 \uc9c0\ubd95\uc5d0 \ub9e4\ub2ec\uc544\uc11c \uc9d1\uc744 \ud558\ub298\ub85c \ub744\uc6b0\ub824 \ud55c\ub2e4. \uac01\uac01\uc758 \ud48d\uc120\uc740 \uace0\ub3c4 \uc81c\ud55c <em>L<sub>i<\/sub><\/em>\uc640 \uc6a9\ub7c9 <em>D<sub>i<\/sub><\/em>\uac00 \uc788\ub294\ub370, \uc774\ub294 \uae30\uc555\uc758 \uc601\ud5a5\uc73c\ub85c \uc778\ud558\uc5ec \uace0\ub3c4 <em>L<sub>i<\/sub><\/em>&nbsp;\uc774\ud558\uc5d0\uc11c\ub9cc \uc774 \ud48d\uc120\uc744 \ubd88 \uc218 \uc788\uace0, \uc774 \ud48d\uc120\uc740 \uace0\ub3c4\ub97c <em>D<sub>i<\/sub><\/em>\ub9cc\ud07c \uc0c1\uc2b9\uc2dc\ud0a8 \ud6c4 \ud130\uc9c4\ub2e4\ub294 \uac83\uc744 \ub73b\ud55c\ub2e4.<\/p>\r\n\r\n<p>\ub2f9\uc2e0\uc758 \uc5ec\uc815\uc740 \uace0\ub3c4 0\uc5d0\uc11c \ucd9c\ubc1c\ud55c\ub2e4. \ubd80\ud480\uc5b4 \uc788\ub294 \ud48d\uc120\uc774 2\uac1c \uc774\uc0c1\uc774\uba74 \uc9d1\uc774 \ub108\ubb34 \ube60\ub978 \uc18d\ub3c4\ub85c \uc0c1\uc2b9\ud560 \uc218 \uc788\uc73c\ub2c8, \ub2f9\uc2e0\uc740 \ud558\ub098\uc758 \ud48d\uc120\uc744 \ubd88\uc5b4\uc11c \uc9c0\ubd95\uc5d0 \ub9e4\ub2e8 \ud6c4, \ud48d\uc120\uc774 \ud130\uc9c8 \ub54c\uac00\uc9c0 \uace0\ub3c4\ub97c \uc0c1\uc2b9\uc2dc\ud0a4\uace0, \ud130\uc9c4 \uc774\ud6c4\uc5d0 \ub610 \ud558\ub098\uc758 \ud48d\uc120\uc744 \ubd88\uc5b4\uc11c \ud130\uc9c8 \ub54c\uae4c\uc9c0 \uace0\ub3c4\ub97c \uc0c1\uc2b9\uc2dc\ud0a4\ub294 \uac83\uc744 \ubc18\ubcf5\ud574\uc11c \uc9d1\uc744 \ub744\uc6b8 \uc608\uc815\uc774\ub2e4. \ud3b8\uc758\uc0c1 \ud130\uc9c4 \uc774\ud6c4 \ud48d\uc120\uc744 \ub9e4\ub2e4\ub294 \ub3d9\uc548\uc758 \uace0\ub3c4 \ubcc0\ud654\ub294 \uc5c6\ub2e4\uace0 \uac00\uc815\ud55c\ub2e4. (\uc989, \ud48d\uc120\ub9cc\uc774 \uc720\uc77c\ud558\uac8c \uace0\ub3c4\ub97c \ubc14\uafc0 \uc218 \uc788\ub2e4.)<\/p>\r\n\r\n<p>\ucd5c\uc885 \uace0\ub3c4\ub294 \uc5b4\ub290 \uc704\uce58\ub358 \uac04\uc5d0 \uc0c1\uad00 \uc5c6\uc73c\ub098, \ud558\ub098\uc758 \ud48d\uc120\uc740 \ud130\uc9c0\uae30 \uc804 \uae4c\uc9c0 \uc77c\uc815\ud55c \uac70\ub9ac\ub97c \uc6c0\uc9c1\uc77c \uc218 \uc788\uc73c\ub2c8, \ucd5c\ub300\ud55c \ub9ce\uc740 \ud48d\uc120\uc744 \ud130\ub728\ub9ac\ub294 \uac83\uc774 \uc88b\ub2e4. \uace0\ub85c \ub2f9\uc2e0\uc740 \ud130\ub728\ub9b4 \uc218 \uc788\ub294 \ud48d\uc120\uc758 \ucd5c\ub300 \uac1c\uc218\ub97c \uacc4\uc0b0\ud55c \ud6c4, \uc815\ub9d0 KAIST\ub85c\uc758 \uc5ec\ud589\uc744 \ub5a0\ub0a0 \uc218 \uc788\ub294\uc9c0\ub97c \uacc4\uc0b0\ud574 \ubcf4\ub824\uace0 \ud55c\ub2e4. 100\ub144 \uc804\uc758 ICPC \uacbd\ud5d8\uc774, \uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ub370 \uc815\ub9d0 \ub3c4\uc6c0\uc744 \uc904 \uc218 \uc788\uc744\uae4c?<\/p>\r\n","input":"<p>\uccab \ubc88\uc9f8 \uc904\uc5d0 \ud48d\uc120\uc758 \uac1c\uc218 <em>N<\/em>\uc774 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n\r\n<p>\uc774\ud6c4 <em>N<\/em>\uac1c\uc758 \uc904\uc758 <em>i<\/em>\ubc88\uc9f8 \uc904\uc5d0\ub294 \ud48d\uc120\uc758 \uace0\ub3c4 \uc81c\ud55c <em>L<sub>i<\/sub><\/em>\uc640 \ud48d\uc120\uc758 \uc6a9\ub7c9 <em>D<sub>i<\/sub><\/em>\ub97c \uc758\ubbf8\ud558\ub294 \uc815\uc218 2\uac1c\uac00 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ub418\uc5b4 \uc8fc\uc5b4\uc9c4\ub2e4.<\/p>\r\n","output":"<p>\ud130\ub728\ub9b4 \uc218 \uc788\ub294 \ud48d\uc120\uc758 \ucd5c\ub300 \uac1c\uc218\ub97c \ucd9c\ub825\ud558\uc5ec\ub77c.<\/p>\r\n","hint":"","original":"1","problem_lang_code":"\ud55c\uad6d\uc5b4","limit":"<ul>\r\n\t<li>1 &le; <em>N<\/em> &le; 250,000<\/li>\r\n\t<li>0 &le; <em>L<sub>i<\/sub><\/em> &le; 10<sup>15<\/sup><\/li>\r\n\t<li>1 &le; <em>D<sub>i<\/sub><\/em> &le; 10<sup>9<\/sup><\/li>\r\n<\/ul>\r\n","subtask1":"<p>\uc774 \uc11c\ube0c\ud0dc\uc2a4\ud06c\ub294 \ub2e4\uc74c\uc758 \uc870\uac74\uc744 \ub9cc\uc871\ud55c\ub2e4.:<\/p>\r\n\r\n<ul>\r\n\t<li><em>N<\/em> &le; 20<\/li>\r\n<\/ul>\r\n","subtask2":"<p>\uc774 \uc11c\ube0c\ud0dc\uc2a4\ud06c\ub294 \ub2e4\uc74c\uc758 \uc870\uac74\uc744 \ub9cc\uc871\ud55c\ub2e4.:<\/p>\r\n\r\n<ul>\r\n\t<li><em>N<\/em> &le; 5,000<\/li>\r\n<\/ul>\r\n","subtask3":"<p>\uc774 \uc11c\ube0c\ud0dc\uc2a4\ud06c\ub294 \ucd94\uac00 \uc81c\ud55c \uc870\uac74\uc774 \uc5c6\ub2e4.<\/p>\r\n"},{"problem_id":"15773","problem_lang":"1","title":"Touch The Sky","description":"<p style=\"text-align: center;\"><img alt=\"\" src=\"https:\/\/onlinejudgeimages.s3-ap-northeast-1.amazonaws.com\/problem\/15773\/touch.jpg\" style=\"width: 675px; height: 450px;\" \/><\/p>\r\n\r\n<p style=\"text-align: center;\">Figure: The house floats up in the sky by balloons. This picture is also used in 2018 KAIST RUN Spring Contest poster.<\/p>\r\n\r\n<p>In the year 2117, Professor Jaemin Yu developed a linear-time algorithm for TSP(Traveling Salesperson Problem). Not long after that happened, all computer systems were destroyed, and nuclear weapons demolished all the lands. You, a great computer expert, also lost your job. With a great despair, you lost your meaning of life long ago. All those things that made your heart beat -- where had they gone? After questioning yourself again and again, your conclusion is ...<\/p>\r\n\r\n<p><em>&quot;If I go to KAIST where I started my first ICPC, can I find a meaning of my life?&quot;<\/em><\/p>\r\n\r\n<p>All transportations were destroyed, but you were an avid ICPC participant, and you collected a lot of century-old balloons in Korean Regionals. If you could float a house with some of those balloons...&nbsp;<\/p>\r\n\r\n<p>Currently you have <em>N<\/em>&nbsp;balloons, and you are trying to float the house into the sky by attaching balloons on the rooftop. Every balloon have altitude limit <em>L<sub>i<\/sub><\/em>&nbsp;and capacity <em>D<sub>i<\/sub><\/em>, which indicates you can blow balloons in altitude at most <em>L<sub>i<\/sub><\/em>, and the balloon busts after increasing the altitude by <em>D<sub>i<\/sub><\/em>.&nbsp;<\/p>\r\n\r\n<p>Your journey starts at altitude 0. If you have more than 1 balloons enlarged, then the house will ascend too fast. Thus, you will blow one balloon and attach it at the rooftop, increase the altitude until the balloons bust, blow the other balloon and attach it to increase the altitude... to make your house float. For convenience, you may assume that <strong>balloons can only increase the altitude<\/strong>.&nbsp;<\/p>\r\n\r\n<p>You don&#39;t care about your final altitude, but a balloon can move a fixed amount of distance. Thus, you want to bust as many balloons as possible. You want to calculate a maximum number of balloons you can bust, and check if you can make a journey to KAIST. Let&#39;s see whether your 100-year-old ICPC experience can help on this problem!<\/p>\r\n","input":"<p>The first line contains <em>N<\/em>, the number of balloons.<\/p>\r\n\r\n<p>In next <em>N<\/em>&nbsp;lines, the altitude limit of <em>i<\/em>-th balloon <em>L<sub>i<\/sub><\/em>, and capacity of <em>i<\/em>-th balloon <em>D<sub>i<\/sub><\/em>&nbsp;are given as two space-separated integers.<\/p>\r\n","output":"<p>Print the maximum number of balloons you can bust.&nbsp;<\/p>\r\n","hint":"","original":"0","problem_lang_code":"\uc601\uc5b4","limit":"<ul>\r\n\t<li>1 &le; <em>N<\/em> &le; 250,000<\/li>\r\n\t<li>0 &le; <em>L<sub>i<\/sub><\/em> &le; 10<sup>15<\/sup><\/li>\r\n\t<li>1 &le; <em>D<sub>i<\/sub><\/em> &le; 10<sup>9<\/sup><\/li>\r\n<\/ul>\r\n","subtask1":"<p>This subtask has additional constraints.:&nbsp;<\/p>\r\n\r\n<ul>\r\n\t<li><em>N<\/em> &le; 20<\/li>\r\n<\/ul>\r\n","subtask2":"<p>This subtask has additional constraints.:&nbsp;<\/p>\r\n\r\n<ul>\r\n\t<li><em>N<\/em> &le; 5,000<\/li>\r\n<\/ul>\r\n","subtask3":"<p>This subtask has no additional constraints.<\/p>\r\n"}]

출처

University > KAIST > 2018 KAIST RUN Spring Contest T번

  • 문제의 오타를 찾은 사람: jh05013
  • 문제를 만든 사람: koosaga

채점

  • 예제는 채점하지 않는다.