n,m,c = map(int,raw_input().split())
if n == 1 and m == 1:
    print 'YES'
elif (n==1 and m==2) or (n==2 and m==1):
    print 'YES'
elif n == 1 or m == 1:
    print 'NO'
elif n % 2 == 0 or m % 2 == 0:
    print 'YES'
else:
    print 'NO'