For the problem Div2/C "PeacefuL Rocks" the solutions were tested till test case 11. However, if you will make a submission for the problem now a new test case "test case 12" is added. Some official submissions which passed system testing are giving TLE at this test case when submitted again.

There seems to be some fault in the system testing as these submissions must fail. Here is the link to one of those accepted submission with the given issue.

Kindly correct me if I am wrong.