'use strict';
(function(stdin) { 
  var inputs = stdin.toString().trim();
  var params = inputs.split('\n')[0].split(' ').map(Number) ;
  (function (a,b,c){
    if(a<b && b<c){
        console.log('Yes');
    } else {
        console.log('No');
    }
})(params[0],params[1],params[2]);
}(require('fs').readFileSync('/dev/stdin', 'utf8')));