public static int NhapN(string note){
int n = int.Parse(Console.ReadLine());
public static int[] NhapMang(int n) {
for (int i = 0; i < n; i++) {
arr[i] = int.Parse(Console.ReadLine());
public static void XuatMang(int[] arr, int n) {
for (int i = 0; i < n; i++) {
Console.WriteLine(arr[i]);
public static int TimGiaTriAmDauTien(int[] arr, int n) {
for (int i = 0; i < n; i++) {
public static void Bai186(int[] arr, int n) {
for (int i = 0; i < n; i++) {
if (TimGiaTriAmDauTien(arr, n) == arr[i]) {
public static void Main()
int n = NhapN("Nhap n: ");