From 30e9b33317a0737d7699e0ab26182061d425f15b Mon Sep 17 00:00:00 2001
From: oncsr <khj20006@naver.com>
Date: Tue, 11 Mar 2025 11:41:55 +0900
Subject: [PATCH] =?UTF-8?q?[20250311]=20BOJ=20/=20P5=20/=20=EB=B0=B0?=
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---
 ...0\354\204\234 \354\235\264\353\217\231.md" | 109 ++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 "khj20006/202503/11 BOJ P5 \353\260\260\354\227\264\354\227\220\354\204\234 \354\235\264\353\217\231.md"

diff --git "a/khj20006/202503/11 BOJ P5 \353\260\260\354\227\264\354\227\220\354\204\234 \354\235\264\353\217\231.md" "b/khj20006/202503/11 BOJ P5 \353\260\260\354\227\264\354\227\220\354\204\234 \354\235\264\353\217\231.md"
new file mode 100644
index 00000000..79f960d7
--- /dev/null
+++ "b/khj20006/202503/11 BOJ P5 \353\260\260\354\227\264\354\227\220\354\204\234 \354\235\264\353\217\231.md"	
@@ -0,0 +1,109 @@
+```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 int N;
+	static int[][] A;
+	
+	static int[] dx = {1,0,-1,0};
+	static int[] dy = {0,1,0,-1};
+	
+	public static void main(String[] args) throws Exception {
+			
+		ready();
+		solve();
+	
+		bwEnd();
+		
+	}
+	
+	static void ready() throws Exception{
+		
+		N = Integer.parseInt(br.readLine());
+		A = new int[N][N];
+		for(int i=0;i<N;i++) {
+			nextLine();
+			for(int j=0;j<N;j++) A[i][j] = nextInt();
+		}
+		
+	}
+	
+	static void solve() throws Exception{
+		
+		int ans = Integer.MAX_VALUE;
+		while(A[0][0] >= 0) {
+			ans = Math.min(ans, findMin());
+			reduce();
+		}
+		bw.write(ans + "\n");
+		
+	}
+	
+	static void reduce() {
+		for(int i=0;i<N;i++) for(int j=0;j<N;j++) A[i][j]--;
+	}
+	
+	static int findMin() {
+		
+		int s = 0, e = 200, m = (s+e)>>1;
+		// m이하인 칸들로만 도달할 수 있는지?
+		while(s<e) {
+			if(bfs(m)) e = m;
+			else s = m+1;
+			m = (s+e)>>1;
+		}
+		return m;
+		
+	}
+	
+	// limit 제한 내에서의 bfs
+	static boolean bfs(int limit) {
+		
+		if(A[0][0] > limit) return false;
+		
+		Queue<int[]> Q = new LinkedList<>();
+		boolean[][] vis = new boolean[N][N];
+		Q.offer(new int[] {0,0});
+		vis[0][0] = true;
+		while(!Q.isEmpty()) {
+			
+			int[] now = Q.poll();
+			int x = now[0], y = now[1];
+			if(x == N-1 && y == N-1) return true;
+			for(int i=0;i<4;i++) {
+				int xx = x+dx[i], yy = y+dy[i];
+				if(safe(xx,yy) && A[xx][yy] <= limit && A[xx][yy] >= 0 && !vis[xx][yy]) {
+					vis[xx][yy] = true;
+					Q.offer(new int[] {xx,yy});
+				}
+			}
+			
+		}
+		
+		return false;
+		
+	}
+	
+	static boolean safe(int x, int y) {
+		return 0<=x&&x<N && 0<=y&&y<N;
+	}
+	
+}
+
+```