Website bug alert: I answered this but I still get the green "Solve challenge" button on the multiple-choice challenges page. The other two challenges show up correctly.

This questions mentions updating the data, but I thought segment trees are static and do not update. What am I missing?

my score didn't get updated.

Tip: Ignore the "on an array" part in the question.

I added an explanation and answer to this question in my HackerRank solutions.

segment