CCC '00 S2 - Babbling Brooks

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Points: 7 (partial)
Time limit: 1.0s
Memory limit: 256M
Problem type
Canadian Computing Competition: 2000 Stage 1, Junior #4, Senior #2

A series of streams run down the side of a mountain. The mountainside is very rocky so the streams split and rejoin many times. At the foot of the mountain, several streams emerge as rivers. Your job is to compute how much water flows in each river.

At any given elevation there are m streams, labelled 1 to m from left-to-right. As we proceed down the mountainside, one of the streams may split into a left fork and a right fork, increasing the total number of streams by 1, or two streams may rejoin, reducing the total number of streams by 1. After a split or a rejoining occurs, the streams are renumbered consecutively from left-to-right. There is always at least one stream and there are never more than 100 streams.

Input Specification

The first line of input contains n, the initial number of streams at some high altitude. The next n lines give the flow in each of the streams from left-to-right. Proceeding down the mountainside, several split or rejoin locations are encountered. For each split location, there will be three lines of input.

  • a line containing 99 (to indicate a split)
  • a line containing an integer, the number of the stream that is split
  • a line containing an integer between 0 and 100, the percentage of flow from the split stream that flows to the left fork. (The rest flows to the right fork)

For each join location, there will be two lines of input:

  • a line containing 88 (to indicate a join)
  • a line containing an integer, the number of the stream that is rejoined with the stream to its right

The flow from both joined streams is combined. After the last split or join location will be:

  • a single line containing 77 (to indicate end of input)

Output Specification

Your job is to determine how many streams emerge at the foot of the mountain and what the flow is in each. Your output is a sequence of real numbers, rounded to the nearest integer, giving the flow in rivers 1 through m.

Sample Input

Copy
3
10
20
30
99
1
50
88
3
88
2
77

Sample Output

Copy
5 55

Comments


  • 1
    sundance  commented 32 days ago ← edit 2

    Hello. So, I pass the first 4 test cases but bomb on the 5th. (I also pass the test case given by Compro72 below.) Is there a mod who can help me understand what my error is?


  • 0
    Satish_iyer  commented 44 days ago

    i am getting index error at 4th and 5th case, can the mod check and help me understand the error


    • 0
      Compro72  commented 42 days ago ← edit 2

      Try this case:

      Copy
      3
10
20
30
88
1
77

      It should output:

      Copy
      30 30

  • 0
    teddycitrus  commented 67 days ago

    are we at the top of the mountain or the bottom of the mountain


    • 1
      _z3_  commented 67 days ago

      As we proceed down the mountainside one of the streams may split into a left fork and a right fork


  • -9
    master114  commented on Sept. 9, 2024, 12:33 p.m.

    This comment is hidden due to too much negative feedback. Show it anyway.


    • 1
      master114  commented on Sept. 10, 2024, 7:02 a.m.

      Thank you for your dislikes -)) I was hoping that this point would simply be explained to me. I thought that if the outermost thread is being merged, then nothing happens. After that, I was able to correct my code and it successfully passed all tests.


  • 5
    maxcruickshanks  commented on July 13, 2020, 8:48 p.m.

    When splitting or merging, left and right is based on your view of the mountain (i.e., the direction is not relative to the split).