import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int num = in.nextInt(); int count = 0; for(int i=1; i<=num; i++){ int result = 0; for(int j=1; j<i; j++){ if(i%j == 0){ result += j; } if(result > i){ break; } } if(i == result){ count++; } } System.out.print(count); } }