알고리즘/해시
[백준] 1764번 듣보잡 #Java
VIPeveloper
2022. 5. 17. 01:56
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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.*;
public class Main {
public static void main(String[] args) throws Exception {
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());
HashMap<String,Integer> hashMap = new HashMap<>();
for (int i = 0; i < n; i++) {
hashMap.put(br.readLine(),1);
}
int answer = 0;
ArrayList<String> res = new ArrayList<>();
for (int i = 0; i < m; i++) {
String s = br.readLine();
int orDefault = hashMap.getOrDefault(s, 0);
if(orDefault != 0){
res.add(s);
answer += orDefault;
}
}
Collections.sort(res);
System.out.println(answer);
for (String s :
res) {
System.out.println(s);
}
}
}
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