import sequtils,strutils

var
    N, M, C : int
(N, M, C) = stdin.readline.split.map(parseInt)

if ((N * M) and 1) == 1:
    echo "NO"
elif N == 1 or M == 1:
    if N * M == 2:
        echo "YES"
    else:
        echo "NO"
else:
    echo "YES"