Hello CODEFORCES !

I am now up solving problems from Div3 and Educational CF rounds . Here I Feeling a difficulty .

In Div3 A, B, C are solvable for me . I sometimes solve D . But most time I fail . I see that the problem's rating too higher for
me . :(

In Educational round sometimes C is easy , sometimes C is too hard ( even B ) . So :( .

So I want to solve problems with a certain difficulty from certain type of contest . Example : I want to solve problems from Div3 Who are 1300 rated .

So I ask help from you .

Thanks in advance .