function Main(input) {
  const args = input.split(' ');
  const A = parseInt(args[0]);
  const B = parseInt(args[1]);
  if( (A * B) % 2 === 0 ) {
    console.log('No');
  } else {
    console.log('Yes');
  }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
