import java.util.Scanner;

public class Main
{
    public static void main(String[] args) 
    {
        Scanner scanner = new Scanner(System.in);
        
        int a = scanner.nextInt();
        int b = scanner.nextInt();
        int c = scanner.nextInt();
        
        
        
        if (a<b && b<c) {
            
        System.out.println("Yes");
        }
        if(a>=b || b>=c){ 
        System.out.println("No");
        }
        return;
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz