#include<bits/stdc++.h>
using namespace std;
int main() {
	int b, s, g, n, sum;
	scanf("%d", &n);
	b=n/100;
	s=n/10%10;
	g=n%10;
	sum=b*b*b+s*s*s+g*g*g;
	if(sum==n)
		printf("Yes\n");
	else
		printf("No\n");
	return 0;
}