[20250813] BOJ / G3 / 우주 탐사선 / 이강현

lkhyun/202508/13 BOJ G3 우주 탐사선.md

@@ -0,0 +1,58 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static int ans;
+    static int N,K;
+    static int[][] dist;
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        K = Integer.parseInt(st.nextToken());
+
+        dist = new int[N][N];
+        for (int i = 0; i < N; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 0; j < N; j++) {
+                dist[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+
+        for (int k = 0; k < N; k++) {
+            for (int i = 0; i < N; i++) {
+                for (int j = 0; j < N; j++) {
+                    dist[i][j] = Math.min(dist[i][j], dist[i][k] + dist[k][j]);
+                }
+            }
+        }
+
+        ans = Integer.MAX_VALUE;
+        boolean[] visited = new boolean[N];
+        visited[K] = true;
+        find(visited,1,0,K);
+
+        bw.write(ans + "");
+        bw.close();
+    }
+
+    static void find(boolean[] visited, int depth, int sum, int prev){
+        if(depth == N){
+            ans = Math.min(ans,sum);
+            return;
+        }
+        if(sum >= ans) return;
+        for (int i = 0; i < N; i++) {
+            if(!visited[i]){
+                visited[i] = true;
+                find(visited, depth+1,sum+dist[prev][i], i);
+                visited[i] = false;
+            }
+        }
+    }
+
+}
+```