Program BTH;
uses crt;
var a:array[1..100000] of longint;
n,s,i:longint;
Begin
clrscr;
write('Nhap n: ');readln(n);
For i:=1 to n do
Begin
write('a[',i,']: ');readln(a[i]);
If a[i]<0 then s:=s+a[i];
end;
writeln('Tong cac so am co trong day la: ',s);
readln;
end.