#include <iostream>

using namespace std;

int main()
{
    int a;
    int b;
    int k;
    int y = 0;
    cin>>k;
    cin>>a;
    cin>>b;
    int x=0;

    if(a>b){
        cout<<"NE";
    }
    if(a==b){
        cout<<"NE";
    }

    if(a<b){
        while(k>=x){
            k+=a;
            x+=b;
            y+=1;
            if(x>=k){
                break;
            }
        }
    }

    if (x==k){
        cout<<y<<endl;

    }
    if (x>k){
        cout<<"NE";
    }





    return 0;
}