Problem 46. Which doors are open?
Solution Stats
Problem Comments
-
9 Comments
The description does not match the example: The point 3 should be "3. On the # trip down the alley, start with door # [and process every #-th door]".
I agree with Jan - the description is not clear. The final instruction should be "return the list of open door #'s", presumably.
If the description was clearer, I'd give this problem a "like", because a good solution depends on a good analysis of the problem more than on just neat coding.
Sorry about the confusion. I tried to clarify the problem description.
Nice problem! The explicit solution was very surprising to me once I found it.
Classic problem--unfortunate that the test suite reveals the punchline.
Yes I initially thought y = sum(open doors)
good problem, easy solution once realising how to solve
easy if to think a bit
Solution Comments
-
1 Comment
good
-
2 Comments
though I did not understand the question...
the problem are not clear, could you explain me?
-
1 Comment
Very nice solution without for loop
-
1 Comment
Problem isn't robust to direction of vector
-
1 Comment
Genius!
-
2 Comments
Nice explanation. I just derivated the formula from the solution ;-)
Thanks for the explanation.
Problem Recent Solvers2785
Suggested Problems
-
219 Solvers
-
Rotate and display numbered tile
293 Solvers
-
Set some matrix elements to zero
375 Solvers
-
408 Solvers
-
Find the sides of an isosceles triangle when given its area and height from its base to apex
1300 Solvers
More from this Author96
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!