[3052] 1차원 배열 - 나머지

문제

 

코드

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main{
    public static void main(String[] args) throws IOException {
        boolean[] arr = new boolean[42];
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        for(int i=0; i<10; i++){
            arr[Integer.parseInt(br.readLine()) % 42] = true;
        }
        
        int cnt=0;
        for(boolean value : arr){
            if(value)
                cnt++;
        }
        System.out.println(cnt);
    }
}