function main(lines) {
  const input = lines.split(' ').map(function(a){return parseInt(a);})
  const a = input[0]
  const b = input[1]
  const c = input[2]
  
  if(a<b && b<c){
      console.log('Yes')
  } else {
      console.log('No')
  }

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