import std.stdio;
import std.ascii;
import std.conv;
import std.string;
import std.algorithm;
import std.range;
import std.functional;
import std.math;
import core.bitop;
import std.numeric;

alias lread = () => readln.chomp.to!long;
alias aryread = () => readln.split.to!(long[]);

void main()
{
    auto ab = aryread();
    (((ab[0] * ab[1]) % 2 == 0) ? "No" : "Yes").writeln;
}
