program bai_giai;
uses crt;
var A:array[1..10000] of integer;
n,i,j,tam,d1,d2:integer;
begin
clrscr;
write('Nhap n: '); readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,': '); readln(A[i]);
end;
d1:=0; d2:=0;
write('B. Mang vua nhap: ');
for i:=1 to n do
begin
write(A[i],' ');
if A[i] mod 2=0 then d1:=d1+1;
if sqrt(A[i])=trunc(sqrt(A[i])) then d2:=d2+1;
end;
writeln;
if d1=0 then write('C. Khong co so chan nao')
else
begin
write('C. Cac so chan la: ');
for i:=1 to n do
if A[i] mod 2=0 then write(A[i],' ');
end;
writeln;
for i:=1 to n-1 do
for j:=i+1 to n do
if A[i]<A[j] then
begin
tam:=A[i];
A[i]:=A[j];
A[j]:=tam;
end;
write('D. Day sap xep giam dan la: ');
for i:=1 to n do write(A[i],' ');
writeln;
if d2=0 then write('E. Khong co so chinh phuong nao')
else
begin
write('E. Cac so chinh phuong la: ');
for i:=1 to n do
if sqrt(A[i])=trunc(sqrt(A[i])) then write(A[i],' ');
end;
readln;
end.
