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문제

개구리 왕눈이는 N개의 연꽃잎이 있는 연못에 살고 있다. 연꽃잎은 1부터 N까지 차례대로 번호가 매겨져 있다. 연못을 위에서 봤을 때 2차원 평면에 연꽃잎이 (x,y) 좌표에 떠 있는 것 처럼 보인다. 왕눈이는 대각선으로 뛰는 것과 음의 방향으로 뛰는 것을 무서워 한다. 좀 더 자세히 말하자면 (x 1,y1)에서 (x2,y2)로 뛰기 위해서는 아래 두 조건 중 하나를 만족해야한다.

  • x2 > x1 이고 y2 = y1
  • y2 > y1 이고 x2 = x1

각 연꽃잎 마다 일정 수의 파리가 있고, 왕눈이는 파리를 먹으며 힘을 회복한다.

왕눈이가 한 번 연꽃잎을 이동하기 위해서는 K 만큼 힘이 든다. 왕눈이는 처음 1번 연꽃잎에서 시작하여 N번 연꽃잎으로 이동하려고 한다. 다만, 도착하고 난 뒤 힘의 최대이고 싶어한다. 처음 왕눈이가 가진 힘은 0 이다. 힘은 항상 0 이상 이어야 한다.

왕눈이를 도와 연꽃잎 사이를 이동하는 경로를 출력하는 프로그램을 작성하시오.

입력

첫 줄에 연꽃잎의 수 N과 한 번 이동하는데 필요한 힘 K가 주어진다. (2 ≤ N ≤ 300 000, 1 ≤ K ≤ 1000)

다음 N개의 줄에 걸쳐 각 연꽃잎의 좌표 X, Y와 파리의 양 F가 차례대로 주어진다. i+1번째 줄에 주어지는 좌표와 파리의 양은 i번 연꽃잎에 관한 정보이다. 연꽃잎의 좌표는 서로 다르다. (0 ≤ X, Y ≤ 100 000, 0 ≤ F ≤ 1000)

입력은 항상 답이 존재하도록 주어진다.

출력

첫 줄에 N번 연꽃잎에 도착 한 뒤 최대 힘의 양을 출력한다.

두 번째 줄에는 1번 연꽃잎과 N번 연꽃잎을 포함하여 방문한 연꽃잎의 수 L을 출력한다.

다음 L개의 줄에 방문한 연꽃잎의 좌표들을 차례대로 출력한다.

만약, 가능한 답이 여러 가지인 경우 그 중 아무거나 하나 출력한다.

예제 입력 1

6 5
1 1 5
2 1 5
1 2 4
2 3 5
3 2 30
3 3 5

예제 출력 1

5
4
1 1
2 1
2 3
3 3
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She lives in a pond where N plants float on the surface of the water. The plants are numbered 1 through N. When viewing from above, the location of each plant is given by a pair of coordinates. What makes Barica unusual is her fear of jumping diagonally and in the negative direction. More precisely, she can jump from a plant at coordinates (x<sub>1<\/sub>, y<sub>1<\/sub>) to another at coordinates (x<sub>2<\/sub>, y<sub>2<\/sub>) only if:&nbsp;<\/p>\r\n\r\n<ul>\r\n\t<li>x<sub>2<\/sub> &gt; x<sub>1<\/sub> and y<sub>2<\/sub> = y<sub>1<\/sub>, or&nbsp;<\/li>\r\n\t<li>y<sub>2<\/sub> &gt; y<sub>1<\/sub> and x<sub>2<\/sub> = x<sub>1<\/sub><\/li>\r\n<\/ul>\r\n\r\n<p>For each plant, we know the number of flies in its immediate vicinity. Barica can use her swift tongue to eat all flies near the plant she is at.&nbsp;<\/p>\r\n\r\n<p>Barica absorbs one energy unit for each fly she eats, and uses K energy units for each jump she makes. Barica can not make a jump if she doesn&#39;t have enough energy units beforehand.&nbsp;<\/p>\r\n\r\n<p>Barica wants to go from plant 1 to plant N and have the largest amount of energy possible after arriving. Barica initially has no energy and must gather energy for her first jump from the flies around plant 1.&nbsp;<\/p>\r\n\r\n<p>Find the sequence of plants Barica should travel to achieve her goal.&nbsp;<\/p>\r\n","input":"<p>The first line of input contains two integers N and K (2 &le; N &le; 300 000, 1 &le; K &le; 1000) separated by a space.&nbsp;<\/p>\r\n\r\n<p>Each of the following N lines contains three integers X, Y and F (0 &le; X, Y &le; 100 000, 0 &le; F &le; 1000) separated by spaces, meaning that there is a plant at coordinates (X, Y) with F flies around it.&nbsp;<\/p>\r\n\r\n<p>The first plant in the input is plant 1, the second is plant 2 etc.&nbsp;<\/p>\r\n\r\n<p>No two plants will share the same pair of coordinates.&nbsp;<\/p>\r\n\r\n<p>Note: The input data will guarantee that a sequence of jumps, although not necessarily unique, will always exist.&nbsp;<\/p>\r\n","output":"<p>Output the final energy level on the first line.&nbsp;<\/p>\r\n\r\n<p>Output an integer L, the number of plants Barica should travel, including plants 1 and N.&nbsp;<\/p>\r\n\r\n<p>On the following L lines, output the sequence of plants Barica should travel.&nbsp;<\/p>\r\n","hint":"","original":"1","problem_lang_code":"\uc601\uc5b4"}]

출처

Contest > Croatian Open Competition in Informatics > COCI 2007/2008 > Contest #5 5번

  • 데이터를 추가한 사람: Acka
  • 빠진 조건을 찾은 사람: corea
  • 문제를 번역한 사람: myungwoo
  • 문제의 오타를 찾은 사람: planetarynebula