function main(input) {
    var args = input.split(' ');
    var a = parseInt(args[0]);
    var b = parseInt(args[1]);
  	var c = [1,2,3];
  
  	const t = a*b;
  	var flag = false;
  	c.forEach( n => {
      if(t * n % 2 == 1){
		flag = true;
      }
    })
    console.log(flag ? 'Yes' : 'No');
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));
