[20251030] BOJ / G4 / 빠른 무작위 메시지 전달 / 김민진

zinnnn37/202510/30 BOJ G4 빠른 무작위 메시지 전달.md

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+```java
+import java.io.*;
+import java.util.StringTokenizer;
+
+public class BJ_25835_빠른_무작위_메시지_전달 {
+
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static StringTokenizer st;
+
+    private static int ans;
+    private static int[][] friends;
+    private static boolean[] visited;
+
+    public static void main(String[] args) throws IOException {
+        init();
+        sol();
+
+        bw.write(ans + "");
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static void init() throws IOException {
+        ans = Integer.MAX_VALUE;
+
+        friends = new int[12][12];
+        for (int i = 0; i < 12; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 0; j < 12; j++) {
+                friends[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+        visited = new boolean[6];
+    }
+
+    private static void sol() throws IOException {
+        for (int nextGroup = 0; nextGroup < 6; nextGroup++) {
+            int next = nextGroup * 2;
+
+            visited[nextGroup] = true;
+            dfs(1, next + 1, friends[next][next + 1]);
+            dfs(1, next, friends[next + 1][next]);
+            visited[nextGroup] = false;
+        }
+    }
+
+    private static void dfs(int depth, int cur, int sum) throws IOException {
+        if (depth == 6) {
+            ans = Math.min(ans, sum);
+            return;
+        }
+
+        for (int i = 0; i < 6; i++) {
+            if (visited[i]) continue;
+
+            int next = i * 2;
+
+            visited[i] = true;
+            dfs(depth + 1, next, sum + friends[cur][next + 1] + friends[next + 1][next]);
+            dfs(depth + 1, next + 1, sum + friends[cur][next] + friends[next][next + 1]);
+            visited[i] = false;
+        }
+    }
+
+}
+```