题解 | #完全数计算#

public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            int a = sc.nextInt();
            int count = 0;
            for(int i=6;i<=a;i++){
                if(wq(i)){
                    count++;
                }
            }
            System.out.println(count);
        }
    }
    
    //判断是不是完全数
    public static boolean wq(int n){
        int sum = 0;
        for(int i=1;i<n;i++){
            if(n%i==0){
                sum = sum+i;
            }
        }
        if(sum==n){
            return true;
        }
        return false;
    }
}