题解 | #完全数计算#

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
	// TODO Auto-generated method stub
	Scanner scan = new Scanner(System.in);
	int in = scan.nextInt();
	
	int count=0;
     for(int i=1; i<=in; i++)
     {
    	if(isPer(i)) count++; 
     }
     System.out.println(count);

}

public static Boolean isPer(int in)
{
	int sum=0;
	
	for(int i=1; i<in;i++)
	{
	   if(in%i==0)
	   {
		   sum=sum+i;
	   }
	}
	
	return sum==in;
}

}