Day 18: Queues and Stacks Hackerrank Solution Java For Explanation Check Video: Sample Input racecar Sample Output The word, racecar, is a palindrome. Code: import java.io.*; import java.util.*; public class Solution { // Write your code here.//racecar Stack<Character> st = new Stack<>(); Queue<Character> q = new LinkedList<>(); void pushCharacter( char ch){ st.push(ch); //race } void enqueueCharacter( char ch){ q.add(ch); //ecar } char popCharacter(){ return st.pop(); //c ...