Which approach is better for improving in competitive programming?
- > Solve problems rating-wise, get stuck, identify the topic, and then learn it.
- > Learn algorithms first, then solve problems topic-wise.
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Solve problems in your rating or above by 100->200 and if some problem needs a topic that you don't know , then that's a sign that you should learn this topic..
Anyway reaching expert doesn't need many topics but DP and Binary search and some standard topics.