#coding: utf-8
##yuki_85

def solve(n,m):
 if n<=1 or m<=1:
  return n<=2 and m<=2
 return (n*m)%2==0
 
n,m,c=map(int,raw_input().split())

if solve(n,m)==True:
 print "YES"
else:
 print "NO"