Hello,in my practise program I solve twice times problems that I did not solve easily the first time. For example if I meet a div 2 C,or D problem that I cant solve,then I look the editorial,and I add this problem to a list for remembering. After one week I try to solve it. But I can solve it easy,because I remember some steps.....

My question is: Is good to re-solve old problems? If yes,then you need to have forgot the solution,or one week after is good?

Thanks,and sorry for bad english :D