program xau_thuan_nhat;
uses crt;
var s,ss,st,si:string; i,j,l:integer;
function kttn(s:string):boolean;
var x:char; ok:boolean;
begin
kttn:=true;
for i:=1 to length(s) do
s[i]:=upcase(s[i]);
for i:=1 to length(s) do
begin
ok:=false;
for x:='A' to 'Z' do
if s[i]=x then ok:=true;
if not ok then begin kttn:=false;break;end;
end;
end;
procedure nen(s:string;var st:string);
begin
ss:='';
while s<>'' do
begin
i:=1;
while (s[i+1]=s[1])and(i<length(s)) do
inc(i);
if i>1 then
begin
str(i,si);
ss:=ss+s[1]+si;
end
else ss:=ss+s[1];
delete(s,1,i);
end;
s:=ss;l:=2;
while l<length(s) do
begin
i:=1;
while i<=length(s)-l do
begin
si:=copy(s,i,l);
j:=i+l;
ss:=copy(s,j,l);
while ss=si do
begin
j:=j+l;
ss:=copy(s,j,l);
end;
if j=i+l then inc(i)
else
begin
str((j-i)div l,ss);
delete(s,i,j-i);
si:='('+si+')'+ss;
insert(si,s,i);
i:=i+l+2+length(ss);
end;
end;
inc(l);
end;
st:=s;
end;
function ktcd(st:string):boolean;
begin
ktcd:=false;
for i:=1 to length(st) do
if st[i]='(' then begin ktcd:=true; break; end;
end;
procedure giainen(st:string;var s:string);
var d,c:byte; code:integer;
begin
while ktcd(st) do
begin
i:=1; c:=0;
while st[i]<>'(' do inc(i);
d:=1; j:=i+1;
while c<d do
begin
inc(j);
if st[j]='(' then inc(d);
if st[j]=')' then inc(c);
end;
si:=copy(st,i,j-i+1);
delete(st,i,j-i+1);
delete(si,1,1);
delete(si,length(si),1);
j:=i;
while st[j+1] in['0'..'9'] do inc(j);
ss:=copy(st,i,j-i+1);
delete(st,i,j-i+1);
val(ss,l,code);
for j:=1 to l do
insert(si,st,i);
end;
i:=1;
while i<=length(st) do
begin
inc(i);
if st[i] in['0'..'9'] then
begin
j:=i;
while st[j+1] in['0'..'9'] do inc(j);
ss:=copy(st,i,j-i+1);
delete(st,i,j-i+1);
val(ss,l,code);
ss:=st[i-1];
for j:=1 to l-1 do insert(ss,st,i);
i:=i+l-1;
end;
end;
s:=st;
end;
begin
clrscr;
write('nhap chuoi: ');readln(s);
if kttn(s) then
begin
nen(s,st);
writeln('Chuoi sau khi nen la: ',st);
giainen(st,s);
writeln('Chuoi sau khi giai nen la: ',s);
end
else write('Xau ko thuan nhat.');
readln;
end.