var x = require('fs').readFileSync('/dev/stdin', 'utf-8');
 
function main(input) {
  var temp = input.split(' ');
  var a = parseInt(temp[0]);
  var b = parseInt(temp[1]);
  var c = parseInt(temp[2]);
  if (a < b && b < c) {
    console.log('Yes');
  } else {
    console.log('No');
  }
}

main(x);
