import std.stdio, std.string, std.range, std.conv, std.array, std.algorithm, std.math, std.typecons, std.functional;

void main() {
    auto tmp = readln.split.to!(int[]);
    auto A = tmp[0], B = tmp[1];
    iota(1,4).any!(C => A * B * C % 2 == 1).pipe!(b => b ? "Yes" : "No").writeln;
}

