import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

a,b,c = map(int,read().split())

answer = 'NO' if (a*b)&1 else 'YES'
if (a == 1) ^ (b == 1):
    answer = 'NO'
if (a,b) in [(1,2),(2,1)]:
    answer = 'YES'
print(answer)