[java] 3052. 나머지

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        boolean[] remainderExists = new boolean[42];  // 0부터 41까지의 나머지에 대한 존재 여부 배열

        for (int i = 0; i < 10; i++) {
            int num = Integer.parseInt(br.readLine());
            int numCorr = num % 42;
            remainderExists[numCorr] = true;
        }

        int count = 0;
        for (boolean exists : remainderExists) {
            if (exists) {
                count++;
            }
        }

        System.out.println(count);
    }
}