import java.util.Scanner;

public class Q2 {
	
	public static boolean twoLengthRun(float[] sequence) {

		if (sequence == null)
			return false;

		for (int i = 0; i < sequence.length - 1; i++)
			if (sequence[i] == sequence[i + 1])
				return true;

		return false;
	}

	public static void main(String[] args) {

		String strNumbers;
		float[] numberArray;
		Scanner in = new Scanner(System.in);

		System.out.println("Please input a list of numbers separated by spaces:");

		strNumbers = in.nextLine();

		if (strNumbers.trim().isEmpty()) {
			System.out.println("The sequence is empty!");
			return;
		}

		String[] strNumberArray = strNumbers.split("\\s+");

		numberArray = new float[strNumberArray.length];

		for (int i = 0; i < strNumberArray.length; i++)
			numberArray[i] = Float.parseFloat(strNumberArray[i]);

		System.out.println("Result: " + twoLengthRun(numberArray));
	}
}