First Bad Version - https://leetcode.com/problems/first-bad-version/description/

Solution - https://leetcode.com/problems/first-bad-version/solutions/6271459/using-range-class-for-readability-by-aks-cqn8

Search Insert Position - https://leetcode.com/problems/search-insert-position/description/

Solution - https://leetcode.com/problems/search-insert-position/solutions/6271452/modularised-using-classes-by-akshay_gupt-7zeh

Find First and Last Position of Element in Sorted Array - https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/description/

Solution - https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/solutions/6271465/small-solution-with-one-binary-search-im-cvke