Search Results for: programming
A sentence is a list of words that are separated by a single space with no leading or trailing spaces. Each of the words consists of only uppercase and …
You are given a string s containing lowercase and uppercase alphabet characters as well as digits from “0” to “9”. Return whether s is a palindrome if we only …
Given a list of unique positive integers nums and a positive integer k, return the number of unique combinations that sum up to k. You may reuse numbers when …
Given an alphanumeric string s, return the second largest numerical digit that appears in s, or -1 if it does not exist. An alphanumeric string is a string consisting …
Given a binary tree root, return the number of nodes that are an only child. A node x is an only child if its parent has exactly one child …