#include <iostream>

using namespace std;

int main()
{
    int a;
    int b;
    int k;
    int y = 0;
    cin>>k;
    cin>>a;
    cin>>b;
    for(int days = 1; days <= 1000; days += 1) {
        if((days * a + k) == (days * b)) {
            cout << days << endl;
            return 0; // zavrsi ja programata
        }
    }

    cout << "NE" << endl;


    return 0;
}