BOJ14425.java

package ¹éÁØ;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import java.util.StringTokenizer;

public class BOJ14425 {
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer(br.readLine());
		int N = Integer.parseInt(st.nextToken());
		int M = Integer.parseInt(st.nextToken());
		Map<String, Integer> map = new HashMap<>();
		
		int cnt = 0;
		for(int i = 0; i < N; i++) {
			map.put(br.readLine(), 0);
		}
		
		
		for(int i = 0; i < M; i++) {
			if(map.containsKey(br.readLine())) {
				cnt++;
			}
		}
		System.out.print(cnt);
	}
}