---
id: ds
title: Data Structures
author: Nathan Wang, Darren Yao, Benjamin Qi
description: Problems and additional resources regarding built-in data structures.
prerequisites:
- Bronze - "Built-In C++ Containers" or "Built-In Java Collections"
(clean this up)
## Problems
**CSES:**
Do roughly the first half of the Sorting and Searching section in the [CSES Problem Set](https://cses.fi/problemset/)
### General
- [Polycarp's Phone Book](http://codeforces.com/contest/860/problem/B) [](56)
- [Jury Marks](http://codeforces.com/contest/831/problem/C) [](67)
- [Mahmoud & Ehab & Function](http://codeforces.com/contest/862/problem/E) [](74)
- [Karen & Cards](http://codeforces.com/contest/815/problem/D) [](86)
- [Tournament](http://codeforces.com/contest/878/problem/C) [](106)