'use strict';
(function(stdin) {
  var inputs = stdin.toString().trim().split('\n');
  var params = inputs[0].split(' ').map(Number);

  (function(a, b, c) {
    // ????????????????????????
    var result = a < b ? (b < c ? 'Yes' : 'No') : 'No';
    console.log(result);

  }(params[0], params[1], params[2]));

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