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#include <iostream>
using namespace std;
int main(){
    int n;
    cin >> n;
    int ge = n%10;
    int shi = n/10%10;
    int bai = n/100;
    if(ge*ge*ge+shi*shi*shi+bai*bai*bai == n){
        cout << "YES";
    }else cout << "NO";
    return 0;
}