In bit-wise operations, we start off from the end (right) of bits, not from the start (left). Also, it is not moving the bits, but flipping the bits.

Approved

approved.

python new test framework

Rust translation

The description says that you need to find the number of bits to convert the number

Complete the function to determine the number of bits required to convert integer A to integer B

But immediately describes that you can move the bits, then the description conflicts with itself

In the example
31  0 0 0 1 1 1 1 1
14  0 0 0 0 1 1 1 0
--- ---------------
bit 7 6 5 4 3 2 1 0

We must remove the bits after indices 0, 4 and insert new ones in their place, then the required number of bits is really two, but if we move the bits between each other, their number will remain the same

Further in tests with numbers 7 and 17 we get
'111' and '10001' where answer 3 is not entirely correct. Only the first bit matches, the rest must be replaced, and then the answer should be 4

That matrix is part of the test suit. Not relevant for the solution.
a and b are nodes, so yes, that's all you need to find the path (or not).

how is suppossed to have access to the matrix of connections? with just 'a' and 'b' should we get the result?

see issue above, please.

Approved.

Java translation

rewrote the description

the graphs are directed. going from A to B is not the same as going from B to A

all done except big cyclic graphs