Coding Games and Programming Challenges to Code Better
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Created by @Westicles,validated by @UnicornP,@FredericLocquet and @Ayza.
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I donāt mean to be rude, but the āwrapping aroundā term can be unclear, is this possible to explain what it means (> and v go back to 0 at the end of the line, < and ^ go to max if they are on 0ā¦) ?
Maybe Iāmp the only concerned, but it did block me a bit.
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Isnāt that the definition of wrapping around (for me at least it is)?
Iām just wondering, what did you understand by that?
Maybe it is in fact confusing and I just got lucky and assumed correctly.
Well, i didnt understand it at all, now i know what it means, at least
If this is a question, the answer is first solution each time. āWrapping aroundā means that. Same issue than me
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I wrote my solution and passed Test 1, Test 2 and Test 3.
Unfortunately Test 4, Test 5 and Test 5 fail because I end up in an endless loop because:
- In Test 4 I have 1 arrow left so it steps around forever.
- In Test 5 I have 7 arrows left which all move up or down on different columns so they will never end up in the same position.
- In Test 6 I have 5 arrows left which all move left or right on different lines so they will never end up in the same position.
Obviously I made some mistake but because Test 4, 5 and 6 have so many arrows at the start itās hard to find out where I went wrong. Does anyone have a hint or custom test case to help me find my error?
Luckily I found my error in my solution, it wasnāt an edge case but at some point I removed an arrow before checking if there maybe were others as well on the same position.
BTW, this may help others having doubts about a case like this:
Based on results from the tests I think result should be 2 and arrows are allowed to pass each other as long as they donāt end up on the exact same position.
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It is so funny to read a such complaint(when the statement of this puzzle is crystal clear) from the one who created Coding Games and Programming Challenges to Code Better puzzle which has tag a Reading the statement and 3 stars rating.
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Making a comment 2 years after, and to say this ! 
Iām guessing you didnāt solve it. Too bad. Donāt hesitate to ask your questions in the dedicated forum 
My only question is why didnāt you follow point 2 of this guide?
P.S. I donāt need anyoneās help to solve puzzles.
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Missing tags for
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Loops
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Hash
[Edit: Original poster has deleted their message.]
Thatās not an appropriate comment. Would you please stop making similar comments in the future?
[Edit: Original poster has deleted their message.]
Iām a moderator. Your recent comment has violated the community guidelines. If this behaviour continues, you will be muted for at least one week, possibly longer. This is an official warning. Please reconsider how you engage with others on the forum.
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It seems to me that some solutions should not pass, as they mark the cells where a ācollisionā occured with an āxā, ignoring such marked cells for further tests. If you have two pair of arrows annihilating each other at the same location, those solutions will not pass (and they should) ??
Is it tested somewhere ?
Example:
0123456789
0..........
1.>..>.....
2.....^....
3..........
4..........
5.....^....
6..........
There will be two different āannihilationsā @cell(5,1), one at t+1, one at t+4 ??
Am I wrong ?
You arenāt wrong.
Iām not sure what solutions you referred to. Iāve just tested 10 of the published Python solutions and all of them passed your custom case correctly.
Iām coding in C++ so ā¦ so checked some C++ solutionsā¦