#include <stdio.h>
#define PAI 3.141592

int main(void)
{ 
 int a,b,c;

 scanf("%d%d%d",&a,&b,&c);
 if(a < b){ 
 if(a < c)(b < c);
 }
   printf("Yes\n");
 } else {

 } printf("No\n");
  return 0; 
  
}