program task2;
var
k,m,c: integer;
x1, x2, y: real;

begin

writeln ('Введите k, m, c');
readln(k,m,c);

x1:= sqr(m) - sqr(k) - 4 * m * c;
writeln('X1 = ', x1);

if (x1 >= 0) then x2:= sqrt(x1)
else if (x1 < 0) then x2:= abs(x1);
writeln('X2 = ',x2);

if (x1 > x2) then y:= x1 else y:= x2;
writeln('y = ',y);

end.