Hi, currently I am practicing around difficulty 1500 in solved-by descending order. However I found out that older problems are like garbage. I mean, not garbage in the actual sense, but they are basically effortless when compared to modern 1500. Nowadays problems look way harder when compared to older ones. There are old 1500 which are comparable to modern 800, if not even easier. Is it good if I keep going this way solving anyway all the problems in solved-by descending order or maybe I would benefit more when solving only hard 1500 from modern contests? I think the difficult will naturally increase anyway after a while if I keep going solving in descending order and also there are chances I anyway meet some new concept to learn, which is always good. However, on the other side, there are chances I just lose my time solving too easy problems. What do u suggest?