diff --git "a/khj20006/202508/09 BOJ P4 \353\213\244\354\230\244\354\235\230 \355\226\211\354\202\254 \352\263\204\355\232\215\355\225\230\352\270\260.md" "b/khj20006/202508/09 BOJ P4 \353\213\244\354\230\244\354\235\230 \355\226\211\354\202\254 \352\263\204\355\232\215\355\225\230\352\270\260.md"
new file mode 100644
index 00000000..de4d0f60
--- /dev/null
+++ "b/khj20006/202508/09 BOJ P4 \353\213\244\354\230\244\354\235\230 \355\226\211\354\202\254 \352\263\204\355\232\215\355\225\230\352\270\260.md"	
@@ -0,0 +1,157 @@
+```java
+import java.util.*;
+import java.io.*;
+
+class IOController {
+	BufferedReader br;
+	BufferedWriter bw;
+	StringTokenizer st;
+
+	public IOController() {
+		br = new BufferedReader(new InputStreamReader(System.in));
+		bw = new BufferedWriter(new OutputStreamWriter(System.out));
+		st = new StringTokenizer("");
+	}
+
+	String nextLine() throws Exception {
+		String line = br.readLine();
+		st = new StringTokenizer(line);
+		return line;
+	}
+
+	String nextToken() throws Exception {
+		while (!st.hasMoreTokens()) nextLine();
+		return st.nextToken();
+	}
+
+	int nextInt() throws Exception {
+		return Integer.parseInt(nextToken());
+	}
+
+	long nextLong() throws Exception {
+		return Long.parseLong(nextToken());
+	}
+
+	double nextDouble() throws Exception {
+		return Double.parseDouble(nextToken());
+	}
+
+	void close() throws Exception {
+		bw.flush();
+		bw.close();
+	}
+
+	void write(String content) throws Exception {
+		bw.write(content);
+	}
+
+}
+
+public class Main {
+
+	static IOController io;
+
+	//
+
+	static int N, M, T;
+	static int[][] row, col;
+	static List<Integer>[] graph;
+	static int[][] par;
+	static int[] dep;
+	static long[] arr;
+
+	public static void main(String[] args) throws Exception {
+
+		io = new IOController();
+
+		init();
+		solve();
+
+		io.close();
+
+	}
+
+	static void init() throws Exception {
+
+		N = io.nextInt();
+		M = io.nextInt();
+		T = io.nextInt();
+		row = new int[N][M];
+		col = new int[N][M];
+		for(int i=0;i<N-1;i++) for(int j=0;j<M;j++) row[i][j] = io.nextInt();
+		for(int i=0;i<N;i++) for(int j=0;j<M-1;j++) col[i][j] = io.nextInt();
+		graph = new List[N*M];
+		for(int i=0;i<N*M;i++) graph[i] = new ArrayList<>();
+		par = new int[N*M+1][17];
+		dep = new int[N*M];
+		arr = new long[T+2];
+
+	}
+
+	static void solve() throws Exception {
+
+		for(int i=0;i<N;i++) for(int j=0;j<M;j++) {
+			if(i<N-1 && row[i][j] == 0) {
+				graph[i*M+j].add((i+1)*M+j);
+				graph[(i+1)*M+j].add(i*M+j);
+			}
+			if(j<M-1 && col[i][j] == 0) {
+				graph[i*M+j].add(i*M+j+1);
+				graph[i*M+j+1].add(i*M+j);
+			}
+		}
+
+		dfs(0,N*M,0);
+		for(int k=1;k<17;k++) for(int i=0;i<N*M;i++) par[i][k] = par[par[i][k-1]][k-1];
+
+		for(int K=io.nextInt();K-->0;) {
+			int s = io.nextInt();
+			int e = io.nextInt();
+			int a = io.nextInt();
+			int b = io.nextInt();
+			int c = io.nextInt();
+			int d = io.nextInt();
+			int v = io.nextInt();
+
+			int x = a*M+b, y = c*M+d;
+
+			int dist = 1, diff = Math.abs(dep[x]-dep[y]);
+			for(int k=0;k<17;k++) if((diff & (1<<k)) != 0) {
+				if(dep[x] > dep[y]) {
+					dist += (1<<k);
+					x = par[x][k];
+				}
+				else {
+					dist += (1<<k);
+					y = par[y][k];
+				}
+			}
+
+			for(int k=16;k>=0;k--) if(par[x][k] != par[y][k]) {
+				dist += (1<<(k+1));
+				x = par[x][k];
+				y = par[y][k];
+			}
+			if(x != y) dist += 2;
+
+			arr[s] += v*dist;
+			arr[e+1] -= v*dist;
+
+		}
+
+		long s = 0;
+		for(int i=1;i<=T;i++) {
+			s += arr[i];
+			io.write(s + "\n");
+		}
+
+	}
+
+	static void dfs(int n, int p, int d) {
+		dep[n] = d;
+		par[n][0] = p;
+		for(int i:graph[n]) if(i != p) dfs(i,n,d+1);
+	}
+
+}
+```