#include <stdio.h>
using namespace std;

int main()
{
int x, a, b, c;
scanf("%d", &x);
a=x/100;
b=(x-a*100)/10;
c=x%10;
if (x==a*a*a+b*b*b+c*c*c)
printf("YES\n");
else
printf("NO\n");
return 0;
}