150 Minutes for 3 Questions:

1. https://leetcode.com/problems/bulb-switcher-iii/

2. Find the maximum even sum of exactly K elements taken from a given integer array

3. Return the length of the minimum-length subarray containing all distinct elements from a given integer array

• Ex 1: [1, 2, 3, 3, 4, 4, 3, 2, 1, 1] (Answer: 4)
• Ex 2: [1, 2, 3, 3, 4, 4, 2, 1, 1] (Answer: 5)