--- id: min-cost-flow title: "Minimum Cost Flow" author: Benjamin Qi description: "?" prerequisites: - Platinum - Maximum Flow frequency: 1 --- Historically restricted to USACO Camp. (Hungarian) * Tutorial * [TopCoder](https://www.topcoder.com/community/data-science/data-science-tutorials/minimum-cost-flow-part-two-algorithms/) * [Johnson's Algorithm](https://en.wikipedia.org/wiki/Johnson%27s_algorithm) * Problems * [April Fool's Problem](http://codeforces.com/contest/802/problem/N) * [Cow & Exercise](https://codeforces.com/contest/1307/problem/G) * consider LP dual