Question https://www.acmicpc.net/problem/18258Codeimport java.io.BufferedReader;import java.io.InputStreamReader;import java.io.IOException;import java.util.StringTokenizer;import java.util.Deque;import java.util.LinkedList; public class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringBuilder ..