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Explanation: Total number of unique elements are 3, i.e[1,2,3] and Therefore return 3 after assigning [1,2,3] in the beginning of the array. Explanation: Total number of unique elements are 4, i.e[1,2 ...

Career-prep-2025: Hands-on projects and study material in Java, Data Structures & Algorithms, Site Reliability Engineering, Cloud (AWS/Azure/GCP/Oracle), and System Design. Documenting my journey ...