import std.stdio;
import std.algorithm;
import std.conv;
import std.string;

void main()
{
	auto tokens = split(chomp(readln()));
	int a = to!int(tokens[0]);
	int b = to!int(tokens[1]);

	if ((a * b) % 2 == 0)
		writeln("No");
	else
		writeln("Yes");

	stdout.flush();
}