Hi, about a time I don't post anything here, I'm finishing my article about graphs, I hope you like it, I'll post the solutions for the problems from several online judges I use in my hatena diary, 'Hatena is a kind of blog, famous in japan, with a clean look'. I'll use it to post solutions because I don't wanna mess this blog with a lot of sparse posts.
http://d.hatena.ne.jp/aajjbb/
