/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
class MyClass {
    public static void main(String args[]) {
        int sum = 0;
        int firstNum = 1;
        int endNum = 8128;
 
        System.out.println("Range is inclusively: " + firstNum + " - " + endNum);
 
        while (firstNum <= endNum) {
            sum = 0;
            for (int i = 2; i <= Math.sqrt(firstNum); i++) {
                if (firstNum % i == 0) {
                    sum = sum + i + (firstNum / i);
                }
            }
 
            sum += 1;
 
            if (sum == firstNum && firstNum != 0) {
                System.out.println(firstNum + " is perfect");
            }
 
            firstNum++;
        }
    }
}
 

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