'use strict';
(function(stdin) {
  var inputs = stdin.toString().trim().split('\n');
  var params = inputs[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')));