[백준-3052번/Java] 나머지

* HashSet 사용 (중복 X, 순서 X)

import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

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

		for (int i = 0; i < 10; i++) {
			int num = sc.nextInt();
			set.add(num % 42);
		}

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

		sc.close();
	}

}