// Ces programmes sont sous licence CeCILL-B V1.
void main() {
double a, b, c, delta;
a = readDouble();
b = readDouble();
c = readDouble();
delta = b * b - 4 * a * c;
if(delta < 0.0) {
println("Pas de solution");
} else {
if(delta == 0.0) {
print("Une solution : ");
println(-b / (2 * a));
} else {
print("Deux solutions : ");
print((-b - Math.sqrt(delta)) / (2 * a));
print(" et ");
println((-b + Math.sqrt(delta)) / (2 * a));
}
}
}