Bài mình chạy rất nhanh nha.
program soledautien;
uses crt;
var A:array[1..100] of integer;
n,i:byte;
ptu:integer;
begin
clrscr;
write('Nhap so luong phan tu cua mang: '); readln(n);
ptu:=0;
for i:=1 to n do
begin
write('Phan tu thu ',i,': '); readln(A[i]);
if (ptu=0) and (A[i] mod 2=0) then ptu:=A[i];
end;
write('Phan tu le dau tien la: ',ptu);
readln;
end.