백준3052: 나머지

문제

https://www.acmicpc.net/problem/3052

문제 풀이

import java.util.*;

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

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

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

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