As you can see,I'm not good at solving hard problems,my atcoder rating is 2138,and because of the time,I didn't compete lot in Codeforces,so my CF rating is even lower than my atcoder.

I could solve *2000 problems and some of *2100~2900 problems by myself in codeforces,but I can't solve *2100 or more problems by myself,what can I do?

And I'm a Chinese junior high school student,I'm not good at Englsh,so I must say sorry to you if you couldn't understand me well.