According to the Coding Competitions site, Google Code Jam is being discontinued, as well as Kick Start. Here is a link for more information. This year, they instead plan to hold four "farewell rounds" with no prizes on April 15th. According to the FAQ, rounds A, B, C, D will be in increasing order of difficulty with Round A being for beginners and Round D having difficulty between Round 3 and the Finals. Additionally, sign-in will be disabled on June 1st and the site will be shut down on July 1st.