open System

let N,M,C =
    let t = Console.ReadLine().Split()
            |> Array.map(int)
    t.[0],t.[1],t.[2]
    
if  (N = 1 && M = 2) || (N = 2 && M = 1) then
    "YES"             
elif N = 1 || M = 1 then
    "NO"
elif N % 2 = 0 || M % 2 = 0 then
    "YES"
else
    "NO"
|> printfn "%s"