uses crt;

var a: array[1..100] of integer;

i,n,s: integer;

begin

clrscr;

write ('nhap n: ');  readln (n);

s:=0;

for i:=1 to n do

begin

write ('nhap phan tu thu ',i,': ');   readln (a[i]);

if a[i]>0 then s:=s+(a[i]*a[i]);

end;

writeln ('S: ',s);

readln;

end.

uses crt;

var a : array [1 .. 100] of integer;

i, N, S : integer;

begin

clrscr;

write('Nhap so phan tu : '); readln(N);

write('Nhap day gom ', N ,' so : ');

S := 0; for i := 1 to N do begin

read(a[i]); if a[i] > 0 then S := S + sqr(a[i]);

end; write('Tong binh phuong so duong = ', S);

readln

end.