{ "data": { "question": { "questionId": "1000439", "questionFrontendId": "LCP 56", "categoryTitle": "Algorithms", "boundTopicId": 1443277, "title": "信物传送", "titleSlug": "6UEx57", "content": "English description is not available for the problem. Please switch to Chinese.", "translatedTitle": "信物传送", "translatedContent": "

欢迎各位勇者来到力扣城，本次试炼主题为「信物传送」。

\n\n

本次试炼场地设有若干传送带，matrix[i][j] 表示第 i 行 j 列的传送带运作方向，\"^\",\"v\",\"<\",\">\" 这四种符号分别表示 上、下、左、右 四个方向。信物会随传送带的方向移动。勇者每一次施法操作，可临时变更一处传送带的方向，在物品经过后传送带恢复原方向。\"lcp

\n\n

通关信物初始位于坐标 start处，勇者需要将其移动到坐标 end 处，请返回勇者施法操作的最少次数。

\n\n

注意：

\n\n\n\n

示例 1：

\n\n
\n

输入：matrix = [\">>v\",\"v^<\",\"<><\"], start = [0,1], end = [2,0]

\n\n

输出：1

\n\n

解释： 如上图所示 当信物移动到 [1,1] 时，勇者施法一次将 [1,1] 的传送方向 ^ 从变更为 < 从而信物移动到 [1,0]，后续到达 end 位置 因此勇者最少需要施法操作 1 次

\n
\n\n

示例 2：

\n\n
\n

输入：matrix = [\">>v\",\">>v\",\"^<<\"], start = [0,0], end = [1,1]

\n\n

输出：0

\n\n

解释：勇者无需施法，信物将自动传送至 end 位置

\n
\n\n

示例 3：

\n\n
\n

输入：matrix = [\">^^>\",\"<^v>\",\"^v^<\"], start = [0,0], end = [1,3]

\n\n

输出：3

\n
\n\n

提示：

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