// parameter "input" gets all data
function Main(input) {
	// the first line is assigned to input[0], the second line is assigned to input[1] similarly.
	var ab = input.split(' ');
	a = parseInt(ab[0]);
	b = parseInt(ab[1]);

	console.log((a*b)%2==0?'No':'Yes');
}
// Don't edit this line!
//Main(require("fs").readFileSync(__dirname+'/in.txt', "utf8"));
Main(require('fs').readFileSync('/dev/stdin', 'utf8'));
