Why fork the best solution only to change it to the ugliest brute force?

Write an algorithm that can handle n where 1000000 ≤ n ≤ 1500000.

(…) it must correctly handle negative numbers as input.

The SSOT rule should be respected by specifications too.

Python2: Clear (or randomize more) your tests. I had 29 123.456.789.0 test cases on Submit, and it is just an example of non-uniqueness.

Python3: I get ✘ Value is not what was expected for the third test case Test.expect(determinant(m2) == -20), but for the input [ [2,5,3], [1,-2,-1], [1, 3, 4]] [freaky non-consistent spaces, btw] my function returns -20 with errors of the order 1e-14. You should use some epsilon comparison.

Python3: The class bool is a subclass of the class int, so the type checking forced by this kata is a silly carping.

Python2: You do not allow imports from __future__ due to some primitive code embedding.

Test Results:
File "<string>", line 13
SyntaxError: from __future__ imports must occur at the beginning of the file

Python3: Check your use of Test.assert_equals

✘  Yep! Seems alright: False should equal True

Random tests are not compatible with Python3:

Time: 118ms Passed: 4 Failed: 0
Test Results:
  Number climber
  Reach a number by doubling the step size at each step.
✔  Test Passed
✔  Test Passed
✔  Test Passed
✔  Test Passed
  Random Tests
STDERR:
Traceback:
   in 
NameError: name 'xrange' is not defined

Python3: Tests passed, running Submit…

Time: 130ms Passed: 1 Failed: 0
Test Results:
✔  Test Passed
STDERR:
Traceback:
   in 
   in random_token
NameError: name 'xrange' is not defined

The specification is broken:

• No mention of a case of path not existing.
• Especially mentions 0x0-grid case and does not mention how to respond to this case.

The path must begin with the start node and end with the end node.

Hmm, so maybe the client wants [None] as the answer to the 0x0 case, since we are given the input where start_node is end_node is None? No?

You should know that Python 3 has the print function.

Test Results:  
File "<string>", line 19  
    print "function has been disabled for this Kata"  
                                                   ^  
SyntaxError: Missing parentheses in call to 'print'