Modulo Kattis Problem Solution In Java

//Nayeem Shahriar Joy,Applied Physics & Electronic Engineering, University of Rajshahi.
 

import java.util.HashSet;

import java.util.Scanner;

import java.util.Set; 

 

public class Joy{

public static void main(String[] args) {

// Get input from the user w/ sentinel logic

Scanner io = new Scanner(System.in);

Set<Integer>s=new HashSet<Integer>();

for(int i=1;i<=10;i++)

{

int a=io.nextInt();

s.add(a%42);

}

System.out.println(s.size());

}

}