[Hash] baekjoon-1764

Author: Seogeurim

README.md

@@ -64,7 +64,7 @@
 | 25  |     | [Baekjoon-17779 게리맨더링 2](./src/Simulation/P17779)  |      |
 | 26  |     | [Baekjoon-2564 경비원](./src/Simulation/P2564)         |      |
 | 27  |     | [Baekjoon-17144 미세먼지 안녕!](./src/Simulation/P17144) |      |
-| 28  |     | [SWEA-5656 벽돌 깨기](./src/Simulation/swea5656)        |      |
+| 28  | ⭐️ | [SWEA-5656 벽돌 깨기](./src/Simulation/swea5656)        |      |
 
 ## String
 
@@ -258,6 +258,7 @@
 |  #  |  ☆  | Problem                                    | Note |
 | :-: | :-: | :----------------------------------------- | :--- |
 | 01  |     | [Programmers 베스트앨범](./src/Hash/prg42579) |      |
+| 02  |     | [Baekjoon-1764 듣보잡](./src/Hash/P1764)     |      |
 
 ## Graph
 

src/Hash/P1764/Main.java

@@ -0,0 +1,32 @@
+package Hash.P1764;
+
+import java.io.*;
+import java.util.*;
+
+public class Main {
+
+    static int N, M;
+    static HashMap<String, Integer> map = new HashMap<>();
+    static List<String> list = new ArrayList<>();
+
+    public static void main(String[] args) throws Exception {
+        System.setIn(new FileInputStream("src/Hash/P1764/input.txt"));
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+
+        for (int i = 0; i < N+M; i++) {
+            map.merge(br.readLine(), 1, Integer::sum);
+        }
+
+        map.forEach((key, value) -> {
+            if (value == 2) list.add(key);
+        });
+
+        list.sort(String::compareTo);
+        System.out.println(list.size());
+        for (String s : list) System.out.println(s);
+    }
+}

src/Hash/P1764/README.md

@@ -0,0 +1,5 @@
+## [baekjoon-1764] 듣보잡
+
+![image](https://user-images.githubusercontent.com/22045163/115133913-acab6280-a046-11eb-89ff-4b14483bb6c0.png)
+
+![image](https://user-images.githubusercontent.com/22045163/115133921-b339da00-a046-11eb-8473-6d78f9918321.png)

src/Hash/P1764/input.txt

@@ -0,0 +1,8 @@
+3 4
+ohhenrie
+charlie
+baesangwook
+obama
+baesangwook
+ohhenrie
+clinton