var m: array[1..100] of integer;
n,i,max,j,t,scp: integer;
begin
clrscr;
write ('nhap n: '); readln (n);
for i:=1 to n do
begin
write ('nhap m[',i,']: '); readln (m[i]);
if max<=abs(m[i]) then max:=abs(m[i]);
end;
for i:=1 to n-1 do
for j:=i+1 to n do
if m[i]<m[j] then
begin
t:=m[i];
m[i]:=m[j];
m[j]:=t;
end;
write ('day sau khi sap xep giam dan: ');
for i:=1 to n do write (m[i],' ');
writeln;
writeln ('gia tri tuyet doi lon nhat trong day: ',max);
write ('cac so chinh phuong trong day: ');
for i:=1 to n do
begin
scp:=trunc(sqrt(m[i]));
if sqr(scp)=m[i] then
write (m[i],' ');
end;
readln;
end.
