#include <iostream>
#include <cstdio>
using namespace std;

int main(void){
	int n, m, c; cin >> n >> m >> c;
	if(n == 1 || m == 1){
		printf("YES\n");
		return 0;
	}
	if((n * m) % 2 == 0){
		printf("YES\n");
		return 0;
	}
	printf("NO\n");
	return 0;
}