From 7a1b24cf2da74fb40e9aab81b36ee4e13bf3868e Mon Sep 17 00:00:00 2001
From: lkhyun <102892446+lkhyun@users.noreply.github.com>
Date: Sat, 5 Jul 2025 16:03:45 +0900
Subject: [PATCH] =?UTF-8?q?[20250705]=20BOJ=20/=20G3=20/=20=ED=94=BC?=
 =?UTF-8?q?=EB=A6=AC=20=EB=B6=80=EB=8A=94=20=EC=82=AC=EB=82=98=EC=9D=B4=20?=
 =?UTF-8?q?/=20=EC=9D=B4=EA=B0=95=ED=98=84?=
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---
 ...4 \354\202\254\353\202\230\354\235\264.md" | 91 +++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 "lkhyun/202507/5 BOJ G3 \355\224\274\353\246\254 \353\266\200\353\212\224 \354\202\254\353\202\230\354\235\264.md"

diff --git "a/lkhyun/202507/5 BOJ G3 \355\224\274\353\246\254 \353\266\200\353\212\224 \354\202\254\353\202\230\354\235\264.md" "b/lkhyun/202507/5 BOJ G3 \355\224\274\353\246\254 \353\266\200\353\212\224 \354\202\254\353\202\230\354\235\264.md"
new file mode 100644
index 00000000..91485cdc
--- /dev/null
+++ "b/lkhyun/202507/5 BOJ G3 \355\224\274\353\246\254 \353\266\200\353\212\224 \354\202\254\353\202\230\354\235\264.md"	
@@ -0,0 +1,91 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class Main{
+    static class pos{
+        int i,j;
+        pos(int i,int j){
+            this.i=i;
+            this.j=j;
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if(this == obj) return true;
+            if(obj == null || getClass() != obj.getClass()) return false;
+            pos other = (pos)obj;
+            return i==other.i && j==other.j;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(i, j);
+        }
+    }
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    static StringTokenizer st;
+    static int N,M;
+    static pos[][] parent;
+    public static void main(String[] args) throws Exception{
+        st = new StringTokenizer(br.readLine());
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+
+        parent = new pos[N][M];
+        for (int i = 0; i < N; i++) {
+            for (int j = 0; j < M; j++) {
+                parent[i][j] = new pos(i,j);
+            }
+        }
+
+        for (int i = 0; i < N; i++) {
+            String line = br.readLine();
+            for (int j = 0; j < M; j++) {
+                char cmd = line.charAt(j);
+                if(cmd == 'U' && i != 0){
+                    merge(i,j,i-1,j);
+                }else if(cmd == 'D' && i != N-1){
+                    merge(i,j,i+1,j);
+                }else if(cmd == 'L' && j != 0){
+                    merge(i,j,i,j-1);
+                }else if(cmd == 'R' && j != M-1){
+                    merge(i,j,i,j+1);
+                }
+            }
+        }
+        Set<pos> s = new HashSet<>();
+        for (int i = 0; i < N; i++) {
+            for (int j = 0; j < M; j++) {
+                s.add(find(i,j));
+            }
+        }
+        bw.write(s.size()+"");
+        bw.close();
+    }
+    static pos find(int i,int j){
+        if(parent[i][j] != null){
+            if(parent[i][j].i == i && parent[i][j].j == j){
+                return parent[i][j];
+            }
+            else{
+                return parent[i][j] = find(parent[i][j].i,parent[i][j].j);
+            }
+        }
+        return null;
+    }
+    static void merge(int i,int j,int k,int l){
+        pos a = find(i,j);
+        pos b = find(k,l);
+
+        if(a != null && b != null){
+            if(a.equals(b)){
+                return;
+            }else{
+                parent[a.i][a.j] = b;
+            }
+        }
+    }
+}
+```