#include <iostream>
using namespace std;
int KiemTra(int n);
int KiemTra(int n)
{
	int du, max,k,a;
	for (int i = 10; n > 0;)
	{
		du = n % i;
		max = du;
		n = n / i;  
		a = n % i;
		cout << "a=" << a;
		cout << "max " << max;
		if (a <= max)
		{
			k = 1;
			break;
		}
		else
		{
			k = 0;
			break;
		}
	}
	if (k*k == 1) return 1;
	else return 0;
}
int main()
{
	int n;
	cout << "Vui long nhap so can kiem tra:";
	cin >> n;
	if (KiemTra(n) == 1)
		cout << "True";
	else cout << "False";
	return 1;
}