#include <iostream>
using namespace std;
int main(){
        int n,num;
        cin>>n;
        num=n;
        int sum=0;
        for(int j=0;j<3;j++){
            sum+=(n%10)*(n%10)*(n%10);
            n/=10;
        }
        if(sum==num)
            cout<<"YES"<<endl;
        else   
            cout<<"NO"<<endl;
    return 0;
}