import std.stdio, std.range, std.conv, std.string, std.array, std.functional, std.math;
import std.algorithm.comparison, std.algorithm.iteration, std.algorithm.mutation, std.algorithm.searching, std.algorithm.setops, std.algorithm.sorting;
import std.container.binaryheap;
import std.typecons; 

void main()
{
    const input = readln().strip.split.to!(long[]);

    foreach(e; 1..4)
    {
        if(input[0] * input[1] * e % 2 == 1)
        {
            writeln("Yes");
            return;
        }
    }
    writeln("No");
}