import java.util.*;
public class Main {

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

    }
}
/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