Hi,

For the fractiles problem, I reasoned as follows:

Let O be the original sequence,
Let Ai be the sequence with complexity i, obtained from O.

Then, if the first tile of O is L, the first K tiles of Ai will be O.
          if the first tile of O is G, then first K tiles of Ai will all be G.

So you could determine whether O has any gold tiles by placing students at 
tiles 2 through k inclusive, right?

If the first tile is gold, then all students will see gold tiles. If any of the 
other tiles are gold, then the corresponding student will see a gold tile.

So, I just listed all the integers from 2 to k for the small input, but it 
wasn't accepted. Can anyone tell me why? The source code in 
python:https://gist.github.com/bigblind/1a36801e7ef7bb4c07b4566c4b386dbe

Thanks to the problem analysis, I understand it wouldn't work for the large 
test case, and lines 18-19 are irrelevant for the small test case, so they 
aren't the issue



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