#include <iostream> #include <cstdio> using namespace std; int d(int k){ return k*k*k;} int main(){ int n,b,m=0,i; cin>>n>>b; for (n;n<=b;n++){ if(n==d(n%10)+d(n%100-n%10)+d(n/100)) m++;} if(m==0) cout<<"NO"; else cout<<m; return 0; }