#include <stdio.h>

int min(int a, int b){
	if(a < b){return a;}
	return b;
}

int main(void){
	int flag;
	int n,m,c;
	
	scanf("%d %d %d", &n, &m, &c);
	
	if(n*m == 2){
		flag =1;
	}else if(min(n,m) < 2){
		flag = 0;
	}else if( (n*m)%2 == 0){
		flag = 1;
	}else{
		flag = 0;
	}
	
	if(flag){
		printf("YES\n");
	}else{
		printf("NO\n");
	}
	
	return 0;
}