#include<cstdio>


int main(void)
{
	int n, m, c;

	while(scanf("%d%d%d", &n, &m, &c)==3)
	{
		int ans=0;
		if(0);
		else if(n==1) ans=(m==2);
		else if(m==1) ans=(n==2);
		else if(n%2==0 || m%2==0) ans=1;

		printf("%s\n", ans?"YES":"NO");
	}

	return 0;
}