{ "data": { "question": { "questionId": "1000563", "questionFrontendId": "LCP 75", "categoryTitle": "Algorithms", "boundTopicId": 2239382, "title": "传送卷轴", "titleSlug": "rdmXM7", "content": "English description is not available for the problem. Please switch to Chinese.", "translatedTitle": "传送卷轴", "translatedContent": "随着不断的深入，小扣来到了守护者之森寻找的魔法水晶。首先，他必须先通过守护者的考验。\n\n考验的区域是一个正方形的迷宫，`maze[i][j]` 表示在迷宫 `i` 行 `j` 列的地形：\n- 若为 `.` ，表示可以到达的空地；\n- 若为 `#` ，表示不可到达的墙壁；\n- 若为 `S` ，表示小扣的初始位置；\n- 若为 `T` ，表示魔法水晶的位置。\n\n小扣每次可以向 上、下、左、右 相邻的位置移动一格。而守护者拥有一份「传送魔法卷轴」，使用规则如下：\n- 魔法需要在小扣位于 **空地** 时才能释放，发动后卷轴消失；；\n- 发动后，小扣会被传送到水平或者竖直的镜像位置，且目标位置不得为墙壁(如下图所示)；\n![image.png](https://pic.leetcode.cn/1681789509-wTekFu-image.png){:width=400px}\n\n在使用卷轴后，小扣将被「附加负面效果」，因此小扣需要尽可能缩短传送后到达魔法水晶的距离。而守护者的目标是阻止小扣到达魔法水晶的位置；如果无法阻止，则尽可能 **增加** 小扣传送后到达魔法水晶的距离。\n假设小扣和守护者都按最优策略行事，返回小扣需要在 「附加负面效果」的情况下 **最少** 移动多少次才能到达魔法水晶。如果无法到达，返回 `-1`。\n\n**注意：**\n- 守护者可以不使用卷轴；\n- 传送后的镜像位置可能与原位置相同。\n\n**示例 1：**\n>输入：`maze = [\".....\",\"##S..\",\"...#.\",\"T.#..\",\"###..\"]`\n>\n>输出：`7`\n>\n>解释：如下图所示：\n>守护者释放魔法的两个最佳的位置为 [2,0] 或 [3,1]：\n>若小扣经过 [2,0]，守护者在该位置释放魔法，\n>小扣被传送至 [2,4] 处且加上负面效果，此时小扣还需要移动 7 次才能到达魔法水晶；\n>若小扣经过 [3,1]，守护者在该位置释放魔法，\n>小扣被传送至 [3,3] 处且加上负面效果，此时小扣还需要移动 9 次才能到达魔法水晶；\n>因此小扣负面效果下最少需要移动 7 次才能到达魔法水晶。\n![image.png](https://pic.leetcode.cn/1681714676-gksEMT-image.png){:width=300px}\n\n\n**示例 2：**\n>输入：`maze = [\".#..\",\"..##\",\".#S.\",\".#.T\"]`\n>\n>输出：`-1`\n>\n>解释：如下图所示。\n>若小扣向下移动至 [3,2]，守护者使其传送至 [0,2]，小扣将无法到达魔法水晶；\n>若小扣向右移动至 [2,3]，守护者使其传送至 [2,0]，小扣将无法到达魔法水晶；\n![image.png](https://pic.leetcode.cn/1681714693-LsxKAh-image.png){:width=300px}\n\n\n**示例 3：**\n>输入：`maze = [\"S###.\",\"..###\",\"#..##\",\"##..#\",\"###.T\"]`\n>\n>输出：`5`\n>\n>解释：如下图所示：\n>守护者需要小扣在空地才能释放，因此初始无法将其从 [0,0] 传送至 [0,4];\n>当小扣移动至 [2,1] 时，释放卷轴将其传送至水平方向的镜像位置 [2,1]（为原位置）\n>而后小扣需要移动 5 次到达魔法水晶\n![image.png](https://pic.leetcode.cn/1681800985-KrSdru-image.png){:width=300px}\n\n**提示：**\n- `4 <= maze.length == maze[i].length <= 200`\n- `maze[i][j]` 仅包含 `\".\"`、`\"#\"`、`\"S\"`、`\"T\"`", "isPaidOnly": false, "difficulty": "Hard", "likes": 9, "dislikes": 0, "isLiked": null, "similarQuestions": "[]", "contributors": [], "langToValidPlayground": "{\"cpp\": false, \"java\": true, 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