---
id: critical
title: "Critical"
author: Benjamin Qi
description: "CSES Critical Cities and Extensions"
prerequisites:
- Gold - Cycle Finding
<info-block title="Pro Tip">
Historically restricted to USACO Camp.
</info-block>
## Paths
CSES Critical Cities https://cses.fi/problemset/task/1703/
Dominator Tree
https://tanujkhattar.wordpress.com/2016/01/11/dominator-tree-of-a-directed-graph/
* https://codeforces.com/gym/100513/problem/L
* https://open.kattis.com/problems/skiresort
## Cycles
- GP of Wroclaw 2020 H
- [The Meeting Place Cannot be Changed](https://codeforces.com/problemset/problem/982/F)
- USACO Camp - Acyclic Graphs
