#include <iostream>

using namespace std;
int main(){
    
    int sales=0;
       
    
    cout << "Enter Sales: ";
    cin >> sales;
    
    if(sales < 500) {
        cout << "\nNeeds improvement";
    }
    else if(sales > 500 && sales <1000){
        cout << "\nGood work";
    }
    else if(sales > 1000 && sales < 2500){
        cout << "\nGreat work";
    }
    else {
        cout << "\nAmazing work, keep it up."; 
    }
    
    return 0;
}