#include<bits/stdc++.h>
using namespace std;
int main(){
    long a,b,c;
    cin >> a >> b >> c;
    if(b*b-4*a*c > 0){
        cout<<2<<endl;
        double sq = sqrt(b*b - 4 * a * c);
        printf("%.18lf\n",-(sq+(double)b)/(2.0*(double)a));
        printf("%.18lf\n",(sq-(double)b)/(2.0*(double)a));
        
    }else if(b*b - 4*a*c == 0){
        cout << 1<<endl;
        printf("%.18lf\n",-(double)b/(2.0*(double)a));
    }else {
        cout<<0<<endl;
    }
    
    
}