CheckAC

Mark problems you have solved on online judges so you can quickly see whether they were accepted. CheckAC automatically retrieves your accepted problems using the online judge usernames you configure and marks them on POJ, ZOJ, and NJUST OJ, saving you from wondering whether you have solved a problem before. CheckAC provides a convenient way to navigate to problems. Just click the CheckAC icon and enter the problem number you want to open to jump to it. Before you navigate, CheckAC also uses color to indicate whether you have solved it. CheckAC also provides a ToDo List so you can easily add problems you want to solve later and navigate to them at any time. CheckAC also offers a simple Follow feature that summarizes the number of problems the people you follow have solved on POJ and ZOJ.