You are given a 2D grid where each cell is either 1 (indicating a server) or 0 (no server). Two servers are said to communicate if they are in the same row or column. The task is to find the number of servers that can communicate with at least one other server.
You are given two strings s and t of the same length. In one step, you can choose any character of t and replace it with another character. Return the minimum number of steps to make t an anagram of s.
You are given an array of integers. Sort the array based on the number of 1’s in the binary representation of each integer. If two integers have the same number of 1’s, sort them in ascending order of the integer value.
In a special ranking system, each voter assigns a rank to all participating teams in a competition. The rankings are based on the most first-place votes, then second-place votes, and so on. If there is still a tie, teams are ranked alphabetically.
You are given a string s and an integer k. Your task is to determine whether it’s possible to use all the characters in the string s to construct exactly k palindromic strings.
You are given a string croakOfFrogs, which represents a mix of sounds from multiple frogs croaking the word ‘croak’. Each frog croaks the sequence of letters: ‘c’, ‘r’, ‘o’, ‘a’, ‘k’. Your task is to determine the minimum number of frogs needed to croak all the sounds in the string, while following the correct letter sequence. If the string is not a valid combination of croaks, return -1.