Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase. Allocate a string and assign input string to it. Change uppercase letters to …
Given an array of integers, 1 ≤ a ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements that appear …
Given a string S, we can transform every letter individually to be lowercase or uppercase to create another string. Return a list of all possible strings we could create. …
Given a n-ary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf …
Given a non-empty array of integers, return the third maximum number in this array. If it does not exist, return the maximum number. The time complexity must be in …
Given a binary array, find the maximum number of consecutive 1s in this array. Example 1: Input: Output: 3 Explanation: The first two digits or the last three digits …
