From 46b9a3929d6a4d6e330b4d5780d4d4f59fd052fc Mon Sep 17 00:00:00 2001
From: monsileI <hansaem900d@kakao.com>
Date: Tue, 12 Jul 2022 21:23:43 +0900
Subject: [PATCH] =?UTF-8?q?=EC=9D=B4=EA=B2=8C=20=EB=8C=80=EC=B2=B4=20?=
 =?UTF-8?q?=EC=99=9C=20=EC=95=88=EB=90=98=EB=8A=94=EA=B2=A8=20=E3=85=A0?=
 =?UTF-8?q?=E3=85=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../src/ssafy_avanced_study/no_1226.java      | 89 +++++++++----------
 .../src/ssafy_avanced_study/no_1247.java      | 23 +++++
 .../src/ssafy_avanced_study/no_1249.java      | 71 +++++++--------
 3 files changed, 99 insertions(+), 84 deletions(-)
 create mode 100644 Basic_Of_Algorithm/src/ssafy_avanced_study/no_1247.java

diff --git a/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1226.java b/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1226.java
index 69eace5..1874fc5 100644
--- a/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1226.java
+++ b/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1226.java
@@ -7,6 +7,9 @@
 
 public class no_1226 {
 	
+	static int answer = 0;
+	static int [][] move = {{1,0},{0,1},{-1,0},{0,-1}};
+	
 	public static void main(String[] args) throws Exception {
 		
 		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
@@ -25,72 +28,60 @@ public static void main(String[] args) throws Exception {
 			
 			q.add(new int[] {0,0});
 			
+			int []start = new int[2];
+			int []end = new int[2];
+			
 			for(int i=0;i<16;i++) {
 					String str =br.readLine();
 				for(int j=0;j<16;j++) {
 					map[i][j] = Integer.parseInt(""+str.charAt(j));
+					if(map[i][j]==2) {
+						start[0] = i;
+						start[1] = j;
+					}else if(map[i][j]==3) {
+						end[0] = i;
+						end[1] = j;
+					}
 				}
 			}
 			
+			
+			
 			int[][]temp = new int[16][16];
-			temp[0][0] = 0;
-			int [][] move = {{1,0},{0,1},{-1,0},{0,-1}};
+			temp[start[0]][start[1]] = 0;
 			
-			int answer = Integer.MAX_VALUE;
-			int answerI = 0;
-			int answerJ = 0;
 			
-			for(int i=0;i<16;i++) {
-				for(int j=0;j<16;j++) {
-					if(map[i][j]==2) {
-						temp[i][j] = 0;
-						q.add(new int[] {i,j});
-					}else if(map[i][j]==3) {
-						answerI = i;
-						answerJ = j;
-					}
-					
-				}
-			}
+			dfs(start[0],start[1],temp,end,map);
 			
-			System.out.println(q.poll()[0]);
-			System.out.println(q.poll()[1]);
 			
-			while(!q.isEmpty()) {
-				
-				int [] cur = q.poll();
-				int i = cur[0];
-				int j = cur[1];
-				
-				for(int d=0;d<4;d++) {
-					
-					int newI = i + move[d][0];
-					int newJ = j + move[d][1];
-					
-					
-					if(newI<0||newJ<0||15<newI||15<newJ) continue;
-					
-					if(map[newI][newJ]==0 && temp[newI][newJ]==0) {
-						temp[newI][newJ] = temp[i][j] + 1;
-						q.add(new int[] {newI,newJ});
-					}
-					
-					
-					
-					
-				}
-				
-				
-				
-			}
 			
-			if(temp[answerI][answerJ] !=0) answer = 1;
-			else answer = 0;
+		}
+		
+		
+	}
+	static void dfs(int i,int j,int[][]temp,int[]end,int[][]map) {
+		
+		
+		if(i==end[0] && j==end[1]) {
+			answer = 1;
+			return;
+		}
+		
+		for(int d=0;d<4;d++) {
+			int newI = i + move[d][0];
+			int newJ = j + move[d][1];
+			
+			if(newI<0||newJ<0||temp.length-1<newI||temp[0].length-1<newJ) continue;
 			
-			System.out.println(answer);
+			if(temp[newI][newJ]==0 && map[newI][newJ]==0) {
+				temp[newI][newJ] = temp[i][j] + 1;
+				dfs(newI, newJ, temp, end, map);
+				temp[newI][newJ] = 0;
+			}
 		}
 		
 		
+		
 	}
 	
 }
\ No newline at end of file
diff --git a/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1247.java b/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1247.java
new file mode 100644
index 0000000..6271940
--- /dev/null
+++ b/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1247.java
@@ -0,0 +1,23 @@
+package ssafy_avanced_study;
+
+import java.util.Scanner;
+
+public class no_1247 {
+
+	public static void main(String[] args) {
+		
+		
+		Scanner sc = new Scanner(System.in);
+		int T;
+		T=sc.nextInt();
+		/*
+		   여러 개의 테스트 케이스가 주어지므로, 각각을 처리합니다.
+		*/
+
+		for(int test_case = 1; test_case <= T; test_case++){
+		
+			
+			
+		}
+	}
+}
\ No newline at end of file
diff --git a/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1249.java b/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1249.java
index d0a2606..16557c5 100644
--- a/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1249.java
+++ b/Basic_Of_Algorithm/src/ssafy_avanced_study/no_1249.java
@@ -8,6 +8,8 @@
 
 public class no_1249 {
 	
+	static int answer = Integer.MAX_VALUE;
+	
 
 	public static void main(String[] args) throws Exception {
 		
@@ -38,48 +40,47 @@ public static void main(String[] args) throws Exception {
 			
 			int[][]temp = new int[size][size];
 			temp[0][0] = 0;
-			int [][] move = {{1,0},{0,1},{-1,0},{0,-1}};
-			
-			int answer = Integer.MAX_VALUE;
-			
-			while(!q.isEmpty()) {
-				
-				int [] cur = q.poll();
-				int i = cur[0];
-				int j = cur[1];
-				
-				for(int d=0;d<4;d++) {
-					
-					int newI = i + move[d][0];
-					int newJ = j + move[d][1];
-					
-					
-					if(newI<0||newJ<0||size-1<newI||size-1<newJ) continue;
-					
-
-					temp[newI][newJ] = map[newI][newJ] + temp[i][j];
-					
-					q.add(new int[] {newI,newJ});
-					
-					if(newI==size-1 && newJ==size-1) {
-
-						answer = Math.min(answer, temp[newI][newJ]);
-					}
-					
-					
-					
-				}
-				
-				
-				
-			}
+		
 			
+		
 			
+			dfs(0,0,temp,map,size);
 			
 			System.out.println(answer);
+			
 		}
 		
 		
 	}
+	static void dfs(int i,int j,int[][]temp,int[][]map,int size) {
+		
+		
+		if(map[i][j]>=answer) return;
+		
+		int [][] move = {{1,0},{0,1},{-1,0},{0,-1}};
+		
+		
+		if(i==size-1 && j ==size-1) {
+			answer = Math.min(answer, temp[size-1][size-1]);
+			return;
+		}
+		
+		for(int d=0;d<4;d++) {
+			
+			int newI = i + move[d][0];
+			int newJ = j + move[d][1];
+			
+			if(newI<0||newJ<0||size-1<newI||size-1<newJ) continue;
+			
+			
+			if(temp[newI][newJ]==0) {
+				temp[newI][newJ] = temp[i][j] + map[newI][newJ];
+				dfs(newI,newJ,temp,map,size);
+				temp[newI][newJ] = 0;
+			}
+			
+			
+		}
+	}
 	
 }
\ No newline at end of file