import java.util.Scanner;
class Main{
public static void main (String[] args){
Scanner scan = new Scanner(System.in);
int a=scan.nextInt();
int b=scan.nextInt();
int c=scan.nextInt();
if(a==b||b==c||a==c){
System.out.println("No");
}else if(a>b||a>c){
System.out.println("No");
}else if(b>c){
System.out.println("No");
}else{
System.out.println("Yes");
}
}
}
/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