a,b,c = io.read("*n", "*n", "*n")
if(a == 1) then
    print(b == 2 and "YES" or "NO")
elseif(b == 1) then
    print(a == 2 and "YES" or "NO")
else
    print((a % 2 == 1 and b % 2 == 1) and "NO" or "YES")
end