Just unblocked this challenge and took 2 top solutions out of you list and copy-pasted it as my submissions, and compared them to the last solution I submited before unlocking.

I guess running conditions are changed - and even those who once had 100 points - are failing now ( note that running times of my solution in other cases are bit -like 20%- lower than these top solutions).

My claim is ,that test #7 was pushed too far - it might depend on the server load or more likely disk speed of server running test cases.

Moreover it is unusable by human beings(or even by some IDEs)

Below the mentioned results.

My solution - submited before unlocking ranked 62.69 points.

0 0.37s : Success (sample)

1 2.59s : Success

2 1.61s : Success

3 0.36s : Success

4 0.86s : Success

5 1.19s : Success

6 2.6s : Success

7 7s : Terminated due to timeout .

relan solution
-ranked 100 points.

0 0.37s : Success (sample)

1 3.82s : Success

2 3s : Success

3 0.38s : Success

4 1.27s : Success

5 2.41s : Success

6 3.63s : Success

7 7s : Terminated due to timeout .

robinst solution-ranked 100 points

0 0.36s : Success (sample)

1 3.79s : Success

2 2.66s : Success

3 0.36s : Success

4 1.36s : Success

5 2s : Success

6 3.41s : Success

7 7s : Terminated due to timeout