uses crt; var a:array[1..10] of real; i:longint; s:extended; begin clrscr; for i:=1 to 10 do begin write('Nhap gia tri phan tu thu ',i,': '); readln(a[i]); if a[i]<0 then s:=s+sqr(a[i]); end; writeln('Tong binh phuong cac so am: ',s:0:2); readln; end.
