var a,b,c,D,x1,x2:real;
begin
writeln('arvud');
readln(a,b,c);
D:=b*b-4*a*c;
if D<0 then writeln('kornei net')
else if D=0 then
begin
x1:=-b/(2*a);
writeln(x1) end
else begin
x1:=(-b+sqrt(D))/(2*a);
x2:=(-b-sqrt(D))/(2*a);
writeln(x1,x2) end;
end.