#include<stdio.h>
#include<stdlib.h>
int tonguocso(int n)
{
	int s = 0;
	for (int i = 1;i<n;i++)
	{
		if (n%i == 0)
			s += i;
	}
	return s;
}
int demsohoanthien(int n)
{
	int dem = 0;
	for (int i = 1;i<n;i++)
	{
		if (tonguocso(i) == i)
			dem++;
	}
	return dem;
}
int main()
{
	int n;
	do
	{
	printf("Nhap so nguyen duong n: ");
	scanf_s("%d", &n);
	if (n<0)
	printf("Nhap lai so nguyen duong n: ");
	} while (n<0);
	printf("co %d so hoan thien nho hon %d", demsohoanthien(n), n);
	system("PAUSE");
	return 0;
}