diff --git "a/sylee723/28\354\243\274\354\260\250/PGS_\352\270\260\353\221\245\352\263\274_\353\263\264_\354\204\244\354\271\230.java" "b/sylee723/28\354\243\274\354\260\250/PGS_\352\270\260\353\221\245\352\263\274_\353\263\264_\354\204\244\354\271\230.java"
new file mode 100644
index 0000000..8a320ce
--- /dev/null
+++ "b/sylee723/28\354\243\274\354\260\250/PGS_\352\270\260\353\221\245\352\263\274_\353\263\264_\354\204\244\354\271\230.java"
@@ -0,0 +1,96 @@
+import java.util.*;
+
+class Solution {
+    static boolean[][][] board;
+    public int[][] solution(int n, int[][] build_frame) {
+        board = new boolean[n + 1][n + 1][2];
+        
+        for (int k = 0; k < build_frame.length; k++) {
+            int x = build_frame[k][0]; // 가로 좌표
+            int y = build_frame[k][1]; // 세로 좌표 
+            int a = build_frame[k][2]; // 0은 기둥, 1은 보
+            int b = build_frame[k][3]; // 0은 삭제, 1은 설치
+            
+            if (isAvailable(x, y, a, b)) {
+                if (b == 0) {
+                    board[y][x][a] = false;
+                } else {
+                    board[y][x][a] = true;
+                }
+            }
+        }
+        
+        ArrayList<int[]> answerList = new ArrayList<>();
+        for (int j = 0; j < board.length; j++) {
+            for (int i = 0; i < board.length; i++) {
+                for (int a = 0; a < 2; a++) {
+                    if (board[i][j][a]) {
+                        answerList.add(new int[] { j, i, a });
+                    }
+                }
+            }
+        }
+        
+        int[][] answer = new int [answerList.size()][];
+        for (int i = 0; i < answerList.size(); i++) {
+            answer[i] = answerList.get(i);
+        }
+        
+        return answer;
+    }
+    
+    static boolean isAvailable(int j, int i, int type, int install) {
+        if (type == 0) { // 기둥
+            if (install == 0) { // 삭제
+                board[i][j][0] = false;
+                
+                for (int c = 0; c < board.length; c++) {
+                    for (int r = 0; r < board.length; r++) {
+                        for (int a = 0; a < 2; a++) {
+                            if (board[r][c][a] && !isAvailable(c, r, a, 1)) {
+                                board[i][j][0] = true;
+                                return false;
+                            }
+                        }
+                    }
+                }
+                
+                board[i][j][0] = true;
+                return true;
+            } else { // 설치
+                if (i == 0 
+                    || (i > 0 && board[i - 1][j][0]) 
+                    || board[i][j][1] || (j > 0 && board[i][j - 1][1])) {
+                    return true;
+                }
+                
+                return false;
+            }
+        } else { // 보
+            if (install == 0) { // 삭제
+                board[i][j][1] = false;
+                
+                for (int c = 0; c < board.length; c++) {
+                    for (int r = 0; r < board.length; r++) {
+                        for (int a = 0; a < 2; a++) {
+                            if (board[r][c][a] && !isAvailable(c, r, a, 1)) {
+                                board[i][j][1] = true;
+                                return false;
+                            }
+                        }
+                    }
+                }
+                
+                board[i][j][1] = true;
+                return true;
+            } else { // 설치 
+                if ((i > 0 && board[i - 1][j][0]) 
+                    || (i > 0 && j + 1 < board.length && board[i - 1][j + 1][0]) 
+                    || (j - 1 >= 0 && j + 1 < board.length && board[i][j - 1][1] && board[i][j + 1][1])) {
+                    return true;
+                }
+                return false;
+            }
+        }
+    }
+}
\ No newline at end of file