'use strict';
var Main = function(stdin) {
  var line = stdin.split('\n');
  var param = line[0].split(' ').map(Number);
  var result = (function(a,b,c) {

  	return (a < b && b < c)
  		? 'Yes'
  		: 'No';
 
  }(
  	param[0],param[1],param[2]
  ));
  console.log(result);
};

Main(require('fs').readFileSync('/dev/stdin', 'utf8'));