var
a,b,c,d,x1,x2:real;
begin
writeln('sisesta a');
readln(a);
writeln('sisesta b');
readln(b);
writeln('sisesta c');
readln(c);
writeln;
d:=b*b-4*a*c;
if d<0 then
writeln('arvud ei sobi')
else
x1:=(-b-sqrt(sqr(b)-4*a*c)/(2*a));
writeln('x1=',x1:7:2);
x2:=(-b+sqrt(sqr(b)-4*a*c)/(2*a));
writeln('x2=',x2:7:2);
end.