This is my second id , I have reached 1600 from my original id , but I cannot solve div2 D's consistently , that's why I keep getting back to specialist. What should I do , how should I practice? I can solve upto 1800 problems(though it takes times sometimes) ,currently I am practicing 1900 rated problems. Should I keep solving 1900 rated problems or do something else like practice topic-wise or something. Please tell me something that has worked for you.