'use strict';
(function(stdin) {
  //declare function
  var f = function(a, b, c) {
    return a < b ? (b < c ? 'Yes' : 'No') : 'No';
  };
  //declare variable
  var inputs = stdin.toString().trim().split('\n');
  var cols = inputs[0].split(' ').map(Number);
  var a = cols[0];
  var b = cols[1];
  var c = cols[2];
  //main

  //display
  console.log(f(a, b, c));
})(require('fs').readFileSync('/dev/stdin', 'utf8'))