EvenNumbers

ackage com.company;
import java.util.ArrayList;
import java.util.Scanner;
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String input = scanner.nextLine();
        char ch = '.';
        if (input.charAt(input.length() - 1) == ch) {
            input = input.substring(0,input.length()-1);
            String[] arr = input.split(" ");

            ArrayList<Long> intNums = new ArrayList<>();
            long maxNumber = Integer.MIN_VALUE;
            long[] nums = new long[arr.length];
            for (int i = 0; i < arr.length; i++) {
                if (isNumeric(arr[i])) {
                    nums[i] = Long.parseLong(arr[i]);
                }
            }
            for (int i = 0; i < nums.length; i++) {
                if (nums[i] % 2 == 0 && nums[i] != 0) {
                    intNums.add(nums[i]);
                }
            }
            if (intNums.size() < 1) {
                System.out.println(-1);
                return;
            }
            for (int i = 0; i < intNums.size(); i++) {
                maxNumber = intNums.get(i) > maxNumber ? intNums.get(i) : maxNumber;
            }
            System.out.println(maxNumber);
            }
        }

        public static boolean isNumeric (String str){
            try {
                Long.parseLong(str);
                return true;
            } catch (NumberFormatException e) {
                return false;
            }
        }
    }