At which rating should I start algorithms and which ones do I need to start learning with ? And how do algorithms come to use when solving problems ?
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At which rating should I start algorithms and which ones do I need to start learning with ? And how do algorithms come to use when solving problems ?
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I don't feel there is some right rating to start learning. Start learning right now. If you are a real beginner, start with sorting techniques and greedy algorithms. Also, learn basic graph techniques like BFS and DFS.
Say you get a graph problem. Here, the question will basically ask you a variant of BFS or DFS which can solve the problem. All you have to do is understand the problem and make the necessary additions. You will get a hang of it once you start solving problems.