{ "data": { "question": { "questionId": "2414", "questionFrontendId": "2337", "categoryTitle": "Algorithms", "boundTopicId": 1655096, "title": "Move Pieces to Obtain a String", "titleSlug": "move-pieces-to-obtain-a-string", "content": "

You are given two strings start and target, both of length n. Each string consists only of the characters 'L', 'R', and '_' where:

\n\n\n\n

Return true if it is possible to obtain the string target by moving the pieces of the string start any number of times. Otherwise, return false.

\n\n

 

\n

Example 1:

\n\n
\nInput: start = "_L__R__R_", target = "L______RR"\nOutput: true\nExplanation: We can obtain the string target from start by doing the following moves:\n- Move the first piece one step to the left, start becomes equal to "L___R__R_".\n- Move the last piece one step to the right, start becomes equal to "L___R___R".\n- Move the second piece three steps to the right, start becomes equal to "L______RR".\nSince it is possible to get the string target from start, we return true.\n
\n\n

Example 2:

\n\n
\nInput: start = "R_L_", target = "__LR"\nOutput: false\nExplanation: The 'R' piece in the string start can move one step to the right to obtain "_RL_".\nAfter that, no pieces can move anymore, so it is impossible to obtain the string target from start.\n
\n\n

Example 3:

\n\n
\nInput: start = "_R", target = "R_"\nOutput: false\nExplanation: The piece in the string start can move only to the right, so it is impossible to obtain the string target from start.
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "移动片段得到字符串", "translatedContent": "

给你两个字符串 start 和 target ，长度均为 n 。每个字符串 仅 由字符 'L'、'R' 和 '_' 组成，其中：

\n\n\n\n

如果在移动字符串 start 中的片段任意次之后可以得到字符串 target ，返回 true ；否则，返回 false 。

\n\n

 

\n\n

示例 1：

\n\n
输入：start = \"_L__R__R_\", target = \"L______RR\"\n输出：true\n解释：可以从字符串 start 获得 target ，需要进行下面的移动：\n- 将第一个片段向左移动一步，字符串现在变为 \"L___R__R_\" 。\n- 将最后一个片段向右移动一步，字符串现在变为 \"L___R___R\" 。\n- 将第二个片段向右移动散步，字符串现在变为 \"L______RR\" 。\n可以从字符串 start 得到 target ，所以返回 true 。\n
\n\n

示例 2：

\n\n
输入：start = \"R_L_\", target = \"__LR\"\n输出：false\n解释：字符串 start 中的 'R' 片段可以向右移动一步得到 \"_RL_\" 。\n但是，在这一步之后，不存在可以移动的片段，所以无法从字符串 start 得到 target 。\n
\n\n

示例 3：

\n\n
输入：start = \"_R\", target = \"R_\"\n输出：false\n解释：字符串 start 中的片段只能向右移动，所以无法从字符串 start 得到 target 。
\n\n

 

\n\n

提示：

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