From 2150bcb80c943a91acd8904eb3f300987c2130ff Mon Sep 17 00:00:00 2001
From: Donew <47556347+03do-new30@users.noreply.github.com>
Date: Fri, 11 Jul 2025 14:38:40 +0900
Subject: [PATCH 1/2] =?UTF-8?q?[20250710]=20BOJ=20/=20G3=20/=20=ED=8C=8C?=
 =?UTF-8?q?=ED=8B=B0=20/=20=EC=8B=A0=EB=8F=99=EC=9C=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../11 BOJ G3 \355\214\214\355\213\260.md"    | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 "03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md"

diff --git "a/03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md" "b/03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md"
new file mode 100644
index 00000000..5e06a56b
--- /dev/null
+++ "b/03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md"	
@@ -0,0 +1,66 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static int N, M, X;
+    static int[][] arr, revArr;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+        X = Integer.parseInt(st.nextToken());
+
+        arr = new int[N+1][N+1]; // 정방향 (a->b)
+        revArr = new int[N+1][N+1]; // 역방향 (a<-b)
+        for (int i = 0; i < M; i++) {
+            st = new StringTokenizer(br.readLine());
+            int a =  Integer.parseInt(st.nextToken());
+            int b = Integer.parseInt(st.nextToken());
+            int c = Integer.parseInt(st.nextToken());
+            arr[a][b] = c;
+            revArr[b][a] = c;
+        }
+
+        int[] fromX = dijkstra(X);
+        
+        arr = revArr;
+        int[] toX = dijkstra(X);
+
+        int answer = 0;
+        for (int i = 1; i <= N; i++) {
+            answer = Math.max(answer, fromX[i] + toX[i]);
+        }
+        System.out.println(answer);
+        br.close();
+    }
+
+    private static int[] dijkstra(int start) {
+        int[] dist = new int[N+1];
+        Arrays.fill(dist, Integer.MAX_VALUE);
+        dist[start] = 0;
+        PriorityQueue<int[]> pq = new PriorityQueue<>(new Comparator<int[]>() {
+            @Override
+            public int compare(int[] o1, int[] o2) {
+                return Integer.compare(o1[0], o2[0]);
+            }
+        });
+        pq.offer(new int[] {0, start}); // (cost, node)
+        while (!pq.isEmpty()) {
+            int[] info = pq.poll();
+            int node = info[1];
+            for (int nextNode = 1; nextNode <= N; nextNode++) {
+                if (arr[node][nextNode] == 0) continue;
+                int newDist = dist[node] + arr[node][nextNode];
+                if (dist[nextNode] > newDist) {
+                    dist[nextNode] = newDist;
+                    pq.offer(new int[] {newDist, nextNode});
+                }
+            }
+        }
+        return dist;
+    }
+}
+```

From b69ce3b1aa7a137893d9ff2ec527b250314b9842 Mon Sep 17 00:00:00 2001
From: Donew <47556347+03do-new30@users.noreply.github.com>
Date: Fri, 11 Jul 2025 14:39:09 +0900
Subject: [PATCH 2/2] =?UTF-8?q?[20250711]=20BOJ=20/=20G3=20/=20=ED=8C=8C?=
 =?UTF-8?q?=ED=8B=B0=20/=20=EC=8B=A0=EB=8F=99=EC=9C=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md" | 1 +
 1 file changed, 1 insertion(+)

diff --git "a/03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md" "b/03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md"
index 5e06a56b..2ce54196 100644
--- "a/03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md"	
+++ "b/03do-new30/202507/11 BOJ G3 \355\214\214\355\213\260.md"	
@@ -2,6 +2,7 @@
 import java.io.*;
 import java.util.*;
 
+
 public class Main {
     static int N, M, X;
     static int[][] arr, revArr;