这个资料是2009年acm/icpc世界总决赛的比赛试题，可以通过试题了解到acm比赛的试题动向-This information is in 2009 acm/icpc final game of the world' s total questions, questions that can match acm test trends

pq分解法，c语言编写，条理清晰，注释详细，构思精巧-Written in C language trends PQ decomposition process, the absolute self, clarity, detailed notes, the idea of compact