I tend to write segment trees in a similar way but I'm not sure what@adamant-pwn would think. Should this be a diff section or undo the previous?

Thanks for the pull request! I also prefer this implementation. Moreover, I would also use half-open intervals, rather than segments. The main issue here is that all the other places in the article still use the old style.@Stillswarm would you have some time to also update the remaining sections of the article to use this style?

@adamant-pwn sure. i will try to refactor as soon as possible