'use strict';
(function(stdin) { 
  var inputs = stdin.toString();
  var params = inputs.split('\n')[0].split(' ').map(Number);
  (function(a,b,c) {
    function B(a,b,c){
        if(a<b<c){
            return('Yes');
        }else{
            return('No');
        }
    }
    console.log(B(a,b,c));

    //????????????????????????

}(params[0],params[1],params[2])); 
}(require('fs').readFileSync('/dev/stdin', 'utf8')));