Detect Duplicates and Nearby Values in Integer Arrays

netflix Problem 1 Given an integer array nums, write a function to check if any value appears at least twice in the array. Return True if any value appears at least twice, and False otherwise. Example: Input: [4, 5, 100, 200, 5] Output: True Problem 2 Given an integer array nums and an integer k, write a function to determine if there are two distinct indices i and j in the array such that nums[i] == nums[j] and the absolute difference between i and j is at most k. Example: Input: nums = [1, 2, 3, 1], k = 3 Output: True Problem 3 Given an integer array nums and an integer T, write a function to determine if there are two distinct indices i and j such that the absolute difference between nums[i] and nums[j] is at most T. Example: Input: nums = [1, 5, 100], T = 4 Output: True Example Input [4, 5, 100, 200, 5]