import java.util.Scanner;

public class Main {

    private final static String YES = "Yes";
    private final static String NO = "No";

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

        int a = scan.nextInt();
        int b = scan.nextInt();
        int c = scan.nextInt();

        int[] array = { a, b, c };

        boolean inputOK = false;

        for (int i : array) {
            if (0 <= i && i <= 100) {
                inputOK = true;
            }
        }

        if (inputOK) {
            if (a < b && a < c) {
                System.out.println(b < c ? YES : NO);
            } else if (a < c && b < c) {
                System.out.println(a < b ? YES : NO);
            } else {
                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