# Educational Contest #3 - Fenwick Tree

# Educational Contest #3 - Fenwick Tree: Đề thi & Lời giải

<p class="callout info">Contest chính thức: [https://oj.giftedbat.edu.vn/contest/contest\_edu\_3](https://oj.giftedbat.edu.vn/contest/contest_edu_3)</p>

<p class="callout success">Lời giải: [\[Solution\] Contest Educational - Fenwick Tree.pdf](https://docs.giftedbat.edu.vn/attachments/266)</p>