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- import java.util.ArrayDeque;
- import java.util.Scanner;
- public class BrowserHistory2 {
- public static void main(String[] args) {
- Scanner scanner = new Scanner(System.in);
- ArrayDeque<String> browser = new ArrayDeque<>();
- String currentURL = scanner.nextLine();
- while (!"Home".equals(currentURL)){
- if(!"back".equals(currentURL)){
- browser.push(currentURL);
- System.out.println(currentURL);
- } else {
- if(browser.size() > 1){
- browser.pop();
- System.out.println(browser.peek());
- } else {
- System.out.println("no previous URLs");
- }
- }
- currentURL = scanner.nextLine();
- }
- }
- }
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