Please remember the following information: Hacks don't affect your rating in the way you might think. Hacks are done during or after a contest to provide a test case for which the given code gives a Wrong Answer or similar verdict. In some contests such as Div2 or Div1+2, it provides additional points, whereas, in Div3 or Div4, this doesn’t give points. If a solution gets hacked, that problem doesn't count in your total problems solved.