Câu 1:
var i,n:integer;
s:longint;
begin
Write('n = ');readln(n)
for i:=1 to n do
s:=s+2*i+1;
write('tong la: ',s);
readln
end.
Câu 2
Bài 5:
Var b:array:[1..1000] of integer;
i,n,max:integer;
Begin
Write('n = ');readln(n);
For i:=1 to n do
Begin
Write('Nhap so thu ',i,' = ');readln(b[i]);
End;
Write('Cac phan tu am la: ');
For i:=1 to n dko
if b[i]<0 then write(b[i]:8);
writeln;
max:=b[1];
For i:=2 to n do
If b[i] > max then max:=b[i];
write('So lon nhat la ',max);
Readln
End.