In order to solve 1300-1600 rated problem,what kind of algo I need to be learned or those also like Div2 A/B,especially I am talking about Div2-c?
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Before 1100 dont learn any dsa and algorithms. Improve your implementation skills and basic maths etc. At 1100 (means now u know how to implement your solution) u can start the basics of (dp,recurrsion and binary search) which can help u solve the div 2c sometimes. Give virtual contest div 3 and div 4 to improve speed.
Nowadays you rarely need a concrete algorithm for Div2C, learn DFS, BFS, DP and binary search, but most importantly practice newer Div2C problems.
U need the roblox algorithm