[20250615] BOJ / G4 / 숨바꼭질 2 / 설진영

Seol-JY/202506/15 BOJ G4 숨바꼭질 2.md

@@ -0,0 +1,54 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static int[] visited = new int[100001];
+    static int minTime = Integer.MAX_VALUE;
+    static int count = 0;
+    static int start, target;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        start = Integer.parseInt(st.nextToken());
+        target = Integer.parseInt(st.nextToken());
+
+        bfs();
+
+        System.out.println(minTime);
+        System.out.println(count);
+    }
+
+    public static void bfs() {
+        Deque<Integer> queue = new ArrayDeque<>();
+        queue.add(start);
+        visited[start] = 1;
+
+        while (!queue.isEmpty()) {
+            int current = queue.poll();
+            int time = visited[current];
+
+            if (current == target) {
+                if (time - 1 < minTime) {
+                    minTime = time - 1;
+                    count = 1;
+                } else if (time - 1 == minTime) {
+                    count++;
+                }
+                continue;
+            }
+
+            for (int next : new int[]{current - 1, current + 1, current * 2}) {
+                if (next < 0 || next > 100000) continue;
+
+                if (visited[next] == 0 || visited[next] == time + 1) {
+                    visited[next] = time + 1;
+                    queue.add(next);
+                }
+            }
+        }
+    }
+}
+
+```