import java.util.Scanner;

public class Equal3numbers {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        int num1 = input.nextInt();
        int num2 = input.nextInt();
        int num3 = input.nextInt();

        if ((num1 == num2) || (num1 == num3)){
            System.out.println("yes");
        }
        else {
            System.out.println("no");
        }
    }
}