#include <stdio.h>

int main()
{
	int a,b,c;
	while(scanf("%d %d %d",&a,&b,&c) != EOF)
	{
		if(a + b == c)
			printf("YES\n");
		else if(a - b == c || b - a == c)
			printf("YES\n");
		else if(a != 0 && b != 0 && (a / b == c || b / a == c) && a%b == 0)
			printf("YES\n");
		else if(a * b == c)
			printf("YES\n");
		else printf("NO\n");
	}

	return 0;
}