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32 lines (27 loc) · 799 Bytes
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import java.io.*;
import java.util.*;
interface AdvancedArithmetic{
int divisorSum(int n);
}
class Calculator implements AdvancedArithmetic {
public int divisorSum(int n) {
int divisorSum = 0;
for(int i = 1;i <= n;i++){
if(n % i == 0){
divisorSum = divisorSum + i ;
}
}
return divisorSum;
}
}
class Day19 {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
scan.close();
AdvancedArithmetic myCalculator = new Calculator();
int sum = myCalculator.divisorSum(n);
System.out.println("I implemented: " + myCalculator.getClass().getInterfaces()[0].getName() );
System.out.println(sum);
}
}