include <stdio.h>

int main() {

int a, b, c, n;
scanf("%d", &n);
a = n;
b = a % 10;
a = a / 10;
c = a % 10;
a = a / 10;
if (n == a * a * a + c * c * c + b * b * b) {
	printf("YES");
} else
	printf("NO");

return 0;

}