...Reference links or book chapters (good material) Template code (can contain some comments, usage instructions) Template supplements (extra codes in common question types, modeling tips, etc.) Related topic links (template questions, classic questions, thinking conversion questions, etc.) The main goal of this stage is to improve the ability to observe problems. Doing construction questions can train this point in a targeted manner. Choose the structural questions (tag: constructive algorithms) whose difficulty ranges from your own rating to rating+200, and do the questions in descending order according to the number of people who have passed the questions.