USACO 2022 US Open

The US Open contest is our final contest of the 2021-2022 season, serving as our "national championship" and receiving high weight during selection of finalists to attend our 2022 summer training camp. The contest ran smoothly and despite a number of relatively difficult problems, we saw impressive scores across all four divisions, and reasonably high numbers of promotions. For those not yet promoted, remember that the more practice you get, the better your algorithmic coding skills will become -- please keep at it! USACO contests are designed to challenge even the very best students, and it can take a good deal of hard work to excel at them. To help you fix any bugs in your code, you can now re-submit your solutions and get feedback from the judging server using "analysis mode". A large number of people contribute towards the quality and success of USACO contests. Those who helped with this contest include Benjamin Qi, Danny Mittal, Michael Cao, Ray Bai, Andrew Wang, Aryansh Shrivastava, Jesse Choe, Nick Wu, Richard Qi, Andi Qu, Spencer Compton, Mark Chen, Jichao Qian, and Daniel Zhang. Thanks also to our translators and to Clemson CCIT for providing our contest infrastructure. Finally, we are grateful to the USACO sponsors for their generous support: Citadel, Ansatz, X-Camp, TwoSigma, EasyFunCoding, and Jump Trading. We hope you enjoyed the 2021-2022 season and look forward to seeing everyone again in fall 2022! Happy coding! \- Brian Dean ([email protected]) Professor and Chair, Division of Computer Science, School of Computing, Clemson University Director, USACO 美国公开赛是我们2021-2022赛季的最后一场比赛，作为我们的“全国冠军”，在选择参加我们2022年夏季训练营的决赛选手时受到高度重视。比赛进行得很顺利，尽管有一些相对困难的问题，但我们在所有四个比赛难度都看到了令人印象深刻的成绩，以及相当多的晋级。 对于那些尚未晋升的人，请记住，您获得的练习越多，您的算法编程技能就会越好——请坚持下去！ USACO 比赛旨在挑战最优秀的学生，要想在他们中脱颖而出可能需要大量的努力。为了帮助您修复代码中的任何错误，您现在可以使用“分析模式”重新提交您的解决方案并从评审服务器获得反馈。 许多人为 USACO 比赛的质量和成功做出了贡献。为本次比赛提供帮助的有 Benjamin Qi、Danny Mittal、Michael Cao、Ray Bai、Andrew Wang、Aryansh Shrivastava、Jesse Choe、Nick Wu、Richard Qi、Andi Qu、Spencer Compton、Mark Chen、Jichao Qian 和 Daniel Zhang。还要感谢我们的翻译人员和克莱姆森 CCIT 提供我们的比赛基础设施。最后，我们感谢 USACO 赞助商的慷慨支持：Citadel、Ansatz、X-Camp、TwoSigma、EasyFunCoding 和 Jump Trading。 我们希望您喜欢 2021-2022 赛季，并期待在 2022 年秋季再次见到大家！ 快乐编程！ ——布赖恩·迪恩 ([email protected]) 克莱姆森大学计算机学院计算机科学系教授兼主席 USACO 主任