function main(input) {
  const args = input.split(' ').map(n => parseInt(n, 10));
  const A = args[0];
  const B = args[1];
  
  if (A * B % 2 === 0) {
    console.log('No');
  } else {
    console.log('Yes');
  }
  
}

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