Hello, I compiled the code and it works well on the instances in the "test_data" folder.

However, when I create my own data, it fails.

I created a file with the following data:

3 1.0 1.0
1 0.0 0.0
2 0.0 1.0
4 1.0 0.0

I think the optimal is 3-4-1-2 or 3-2-1-4.
But the program gives 3-1-2-4.

Do I miss something?

Thanks!