#include <iostream>
    using namespace std;
    int main()
    {
        int K, A, B;
        cin >> K >> A >> B;
        int kire = K;
        int mete = 0;
        for(int i = 0; i <= 10000; i++){
            if(kire == mete) {
                cout << i << endl;
                return 0;
            }
            kire += A;
            mete += B;
        }
        cout << "NE" << endl;
        return 0;
    }