Learnt about this new package java.math.BigInteger it allows us to use larger values of integer
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While solving Q217 discovered something just like HashMap there exists HashSet which has only values instead of the usual key and value pair in HashMap. Used #ChatGPT to get all the functions used in HashMap and HashSet.
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Saw this one video called 8 algorithms to master 80% of LeetCode probs First one was Sliding window pattern solved one question and then on the next question Q219 I switched to JAVA cause it seemed easier but when I showed chat GPT it said better to use the concept of HashMap
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