You are managing a product development process where each version of the product is based on its previous version. However, you have a version that failed the quality check. Since all subsequent versions are based on the previous ones, they also fail the quality check. Your task is to find the first bad version that caused all subsequent versions to be bad. You are given an API bool isBadVersion(version) that returns true if the version is bad, and false otherwise. Your goal is to find the first bad version while minimizing the number of calls to the API.
Given an integer array nums, move all the zeros to the end while maintaining the relative order of the non-zero elements. Perform the operation in-place without making a copy of the array.
Given an integer n, return an array ans of length n + 1 such that for each i (0 <= i <= n), ans[i] is the number of 1’s in the binary representation of i.
Given an integer n, return true if it is a power of four. Otherwise, return false. An integer n is a power of four if there exists an integer x such that n == 4^x.
You are given a list of characters s. Your task is to reverse the order of characters in the list in-place, modifying the input list directly and without using any extra memory.
