백준 14425

BAEKJOON_14425.java

package silver_3;

import java.io.*;
import java.util.*;

public class NUM_14425 {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(System.out));
        StringTokenizer stringTokenizer = new StringTokenizer(bufferedReader.readLine());
        Set<String> set = new HashSet<>();
        int answer = 0;

        int nCount = Integer.parseInt(stringTokenizer.nextToken());
        int mCount = Integer.parseInt(stringTokenizer.nextToken());

        for (int i = 0; i < nCount; i++) {
            String str = bufferedReader.readLine();
            set.add(str);
        }
        for (int i = 0; i < mCount; i++) {
            String str = bufferedReader.readLine();
            if (set.contains(str)) answer++;
        }

        bufferedWriter.write(answer+"");
        bufferedWriter.flush();
        bufferedReader.close();
        bufferedWriter.close();
    }
}