(stdin => {
  // Define Function
  const lessThen = (a,b) => a<b
  const range = f => (a,b,c) => f(a,b) && f(b,c)
  // Declare Variable
  const inputs = stdin.toString().trim().split('\n')
  const [a,b,c] = Array.from (inputs[0].split(' '),Number)
  console.log(range(lessThen)(a,b,c)?'Yes' : 'No')
})(require('fs').readFileSync('/dev/stdin', 'utf8'))
