СРОЧНО!!!
program c4;
var s,c : string;
i,p,q,r,d,e,j : integer;
x1,x2 : real;
f : TextFile;
begin
assignfile(f,'input.txt');
reset(f);
p:=0;
q:=0;
r:=0;
i:=1;
c:='';
while (s[i]<>'a') do
begin
c:=c+s[i];
inc(i);
end;
Val(c,p,e);
if p=0 then p:=1;
inc(i);
c:='';
while (s[i]<>'b') do
begin
c:=c+s[i];
inc(i);
end;
Val(c,q,e);
c:='';
inc(i);
for j:=i to Length(s) do
begin
c:=c+s[j];
end;
Val(c,r,e);
d:=q*q-4*p*r;
closefile(f);
append(f);
writeln(f);
if d>0 then
begin
x1:=(-q-sqrt(d))/(2*p);
x2:=(-q+sqrt(d))/(2*p);
writeln(f,x1);
writeln(f,x2);
end;
if d=0 then
begin
x1:=(-q)/(2*p);
writeln(f,x1);
end;
closefile(f);
end.