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HouseParty

a guest Feb 18th, 2020 86 Never
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  1. import java.util.ArrayList;
  2. import java.util.List;
  3. import java.util.Scanner;
  4.  
  5. public class ListHouseParty {
  6.     public static void main(String[] args) {
  7.         Scanner scanner = new Scanner(System.in);
  8.  
  9.         List<String> guestList = new ArrayList<>();
  10.         int n = Integer.parseInt(scanner.nextLine());
  11.  
  12.         for (int i = 0; i < n; i++) {
  13.             String[] tokens = scanner.nextLine().split("\\s+", 2);
  14.             String name = tokens[0];
  15.             if (tokens[1].equals("is going!")) {
  16.                 if (guestList.contains(name)) {
  17.                     System.out.println(String.format("%s is already in the list!", name));
  18.                 } else {
  19.                     guestList.add(name);
  20.                 }
  21.             } else {
  22.                 if (guestList.contains(name)) {
  23.                     guestList.remove(name);
  24.                 } else {
  25.                     System.out.println(String.format("%s is not in the list!", name));
  26.                 }
  27.             }
  28.         }
  29.         for (String guest : guestList) {
  30.             System.out.println(guest);
  31.         }
  32.     }
  33. }
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