function Main(input) {
	input = input.split("\n")
	const tmp = input[0].split(" ")

	const a = parseInt(tmp[0], 10)
	const b = parseInt(tmp[1], 10)

	console.log((a * b) % 2 ? "Yes" : "No")
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"))
