Dynamic prefix sum online Judge

Hello guys,

I’m working on some report class where I need to describe the segment tree and I need to add some problem resolution with it.

At the moment I’m describing the dynamic prefix sum with the Segment tree but I’m not able to fine some judge to check my code online.

Can suggest to me some online judge check my solution? or maybe there is some problem that use the dynamic prefix sum as solution that you can suggest to me?