36 lines
No EOL
1.4 KiB
Markdown
36 lines
No EOL
1.4 KiB
Markdown
---
|
|
id: 2P
|
|
title: "Two Pointers"
|
|
author: Darren Yao
|
|
prerequisites:
|
|
- Silver - Introduction to Sorting
|
|
description: Two pointers refers to iterating two monotonic pointers across an array to search for a pair of indices satisfying some condition in linear time.
|
|
---
|
|
|
|
## Tutorials
|
|
|
|
- Intro to USACO 14.1
|
|
- CPH 8.1
|
|
|
|
## Problems
|
|
|
|
- CSES
|
|
- [Sum of Two Values](https://cses.fi/problemset/task/1640)
|
|
- USACO
|
|
- [Silver - Diamond Collector](http://usaco.org/index.php?page=viewproblem2&cpid=643)
|
|
- sort and then use 2P
|
|
- [Silver - Paired Up](http://usaco.org/index.php?page=viewproblem2&cpid=738)
|
|
- sort and then use 2P
|
|
- [Gold - Haybale Feast](http://usaco.org/index.php?page=viewproblem2&cpid=767)
|
|
- just 2P with additional set
|
|
- CF
|
|
- [Books](https://codeforces.com/problemset/problem/279/B)
|
|
- [Cellular Network](http://codeforces.com/problemset/problem/702/C) [](48)
|
|
- [USB vs. PS/2](http://codeforces.com/problemset/problem/762/B) [](53)
|
|
- [K-Good Segment](http://codeforces.com/problemset/problem/616/D) [](53)
|
|
- [(Long Title)](http://codeforces.com/problemset/problem/814/C) [](54)
|
|
- [Jury Meeting](http://codeforces.com/problemset/problem/853/B) [](90)
|
|
|
|
## Extensions
|
|
|
|
The two pointers technique can be extended to the two dimensional sliding window algorithm. If you're looking for a more challenging problem using 2-D sliding window, see [USACO Plat Fort Moo](http://usaco.org/index.php?page=viewproblem2&cpid=600). |