diff --git "a/JHLEE325/202509/18 BOJ G3 \352\262\214\354\236\204 \352\260\234\353\260\234.md" "b/JHLEE325/202509/18 BOJ G3 \352\262\214\354\236\204 \352\260\234\353\260\234.md"
new file mode 100644
index 00000000..c35c3351
--- /dev/null
+++ "b/JHLEE325/202509/18 BOJ G3 \352\262\214\354\236\204 \352\260\234\353\260\234.md"	
@@ -0,0 +1,62 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static int n;
+    static int[] buildTime;
+    static List<Integer>[] require;
+    static int[] dp;
+    static boolean[] visited;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st;
+
+        n = Integer.parseInt(br.readLine());
+        buildTime = new int[n + 1];
+        require = new ArrayList[n + 1];
+        dp = new int[n + 1];
+        visited = new boolean[n + 1];
+
+        for (int i = 1; i <= n; i++) {
+            require[i] = new ArrayList<>();
+        }
+
+        for (int i = 1; i <= n; i++) {
+            st = new StringTokenizer(br.readLine());
+            buildTime[i] = Integer.parseInt(st.nextToken());
+
+            while (true) {
+                int pre = Integer.parseInt(st.nextToken());
+                if (pre == -1) break;
+                require[i].add(pre);
+            }
+        }
+
+        StringBuilder sb = new StringBuilder();
+        for (int i = 1; i <= n; i++) {
+            sb.append(dfs(i)).append("\n");
+        }
+        System.out.print(sb);
+    }
+
+    static int dfs(int i) {
+        if (visited[i]) return dp[i];
+
+        if (require[i].isEmpty()) {
+            dp[i] = buildTime[i];
+        } else {
+            int maxPre = 0;
+            for (int pre : require[i]) {
+                maxPre = Math.max(maxPre, dfs(pre));
+            }
+            dp[i] = maxPre + buildTime[i];
+        }
+
+        visited[i] = true;
+        return dp[i];
+    }
+}
+
+```