[20250206] BOJ / 골드3 / 아기돼지와 늑대 / 권혁준

Author: oncsr

khj20006/202502/06 BOJ G3 아기돼지와 늑대.md

@@ -0,0 +1,92 @@
+```java
+
+import java.util.*;
+import java.io.*;
+
+class Main {
+	
+	// IO field
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	static StringTokenizer st;
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+	static long nextLong() {return Long.parseLong(st.nextToken());}
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+	
+	// Additional field
+	static char[][] arr;
+	static boolean[][] vis;
+	static int[] dx = {1,0,-1,0};
+	static int[] dy = {0,1,0,-1};
+	
+	static int N, M;
+	
+	
+	
+	public static void main(String[] args) throws Exception {
+		
+		ready();
+		solve();
+		
+		bwEnd();
+	}
+	
+	static void ready() throws Exception{
+
+		nextLine();
+		N = nextInt();
+		M = nextInt();
+		arr = new char[N][M];
+		vis = new boolean[N][M];
+		for(int i=0;i<N;i++) arr[i] = br.readLine().toCharArray();
+		
+	}
+	
+	static void solve() throws Exception{
+
+		Queue<int[]> Q = new LinkedList<>();
+		for(int i=0;i<N;i++) for(int j=0;j<M;j++) if(arr[i][j] == 'W') {
+			Q.add(new int[] {i,j});
+			vis[i][j] = true;
+		}
+		
+		while(!Q.isEmpty()) {
+			int[] temp = Q.poll();
+			int x = temp[0], y = temp[1];
+			
+			for(int i=0;i<4;i++) {
+				int xx = x+dx[i], yy = y+dy[i];
+				while(arr[xx][yy] == '+') {
+					xx += dx[i];
+					yy += dy[i];
+				}
+				
+				if(arr[xx][yy] == '#') {
+					xx -= dx[i];
+					yy -= dy[i];
+				}
+				
+				if(vis[xx][yy]) continue;
+				Q.offer(new int[] {xx,yy});
+				vis[xx][yy] = true;
+				
+			}
+			
+		}
+		
+		for(int i=0;i<N;i++) {
+			for(int j=0;j<M;j++) {
+				if(arr[i][j] == '.' && !vis[i][j]) bw.write('P');
+				else bw.write(arr[i][j]);
+			}
+			bw.write("\n");
+		}
+		
+		
+	}
+	
+}
+
+```