import sys
input=lambda: sys.stdin.readline().rstrip()
n,m,c=map(int,input().split())
if n==1 and m==1:
  print("YES")
elif n==1 and m==2:
  print("YES")
elif 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")