#include <iostream>
#include <cmath>

using namespace std;

int dis(int a, int b, int c) {
    return b * b - (4 * a * c);
}
int X1(int b, int d, int a) {
    return (-b + sqrt(d)) / (2 * a);
}

int main() {
    int a, b, c, d, x1, x2;
    cin >> b >> a >> c;
    d = dis(b, a, c);
    cout << "D = " << d << endl;
    if (d < 0) {
        cout << "Нет решений." << endl;
    }
    else
    if (d == 0) {
        x1 = X1(b, d, a);
    cout << "x1 = " << x1 << endl;
    }
    else
        x1 = X1(b, d, a);
        x2 = (-b - sqrt(d)) / (2 * a);
    cout << "x1 = " << x1 << endl << "x2 = " << x2 << endl;
}