1.
uses crt;
var i,n,am,du:longint; a:array[1..100000]of longint;
begin
clrscr;
write('Nhap so phan tu: ');readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,': ');readln(a[i]);
if a[i]<0 then inc(am,a[i]) else inc(du,a[i]);
end;
writeln(am,' ',du);
readln
end.
2.
uses crt;
var i,n,t:longint; a:array[1..100000]of longint;
begin
clrscr;
t:=1;
for i:=1 to 10 do
begin
write('Nhap phan tu thu ',i,': ');readln(a[i]);
if a[i] mod 2=0 then t:=t*a[i];
end;
writeln(t);
readln
end.