Rejected: the solution is trivial

Old test framework, old language version. Rejected.

This does two iterations where the solution can be found with only one.

modulo operation was expensive isn't it? it can be done without using module operation at all..

This is I guess the best answer

This seems like a thing of beauty

approved.

Rust translation ready for review.

This is really fucking smart

Yeah, I have not got a clue from the description what I've actually to do.

It badly needs a decent worked example.

I thought I understood it until this line:

The transformed first chromosome must appear at the first position of the tuple. the second one at the second position. Therefore :

Crossover([]int { 1 }, []int {1,2,3}, []int {10,11,12}) should be ([]int { 1,11,12 }, int[] { 10,2,3 })

What is this saying ?

I think it would be better if at least one detailed(with all iterations) solution was given in the description

Python fork fixing the issues mentioned.

Python: No random tests (and uses old test framework)