var a,b,c,x1,x2:real;
p:byte;
procedure lin(b,c:real; var x1:real; var p:byte);
begin
if b=0 then
if c=0 then p:=4
else p:=0
else begin
p:=2;
x1:=-c/b;
end;
end;
procedure kvadr(a,b,c:real; var x1,x2:real; var p:byte);
var d:real;
begin
d:=sqr(b)-4*a*c;
if d=0 then begin
p:=2; x1:=-b/(2*a);
end
else
if d<0 then p:=1
else if d>0 then begin
p:=3;
x1:=(-b+sqrt(d))/(2*a);
x2:=(-b-sqrt(d))/(2*a);
end;
end;
procedure vyvod(x1,x2:real;p:byte);
begin
case p of
1:writeln('NET RESHENII');
2:begin
writeln('Odno reshenie');
writeln('X=',x1:0:3);
end;
3:begin
writeln('Dva reshenia');
writeln('X1=',x1:0:3,' X2=',x2:0:3);
end;
4:writeln(' Beschislennoe mnojestvo reshenii');
end;
end;
BEGIN
writeln;writeln;
write('Vvedite a,b,c: ');
readln(a,b,c);
if a=0 then lin(b,c,x1,p)
else kvadr(a,b,c,x1,x2,p);
writeln;
vyvod(x1,x2,p);
readln

END.

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