{ "data": { "question": { "questionId": "514", "questionFrontendId": "514", "categoryTitle": "Algorithms", "boundTopicId": 1753, "title": "Freedom Trail", "titleSlug": "freedom-trail", "content": "

In the video game Fallout 4, the quest "Road to Freedom" requires players to reach a metal dial called the "Freedom Trail Ring" and use the dial to spell a specific keyword to open the door.

\n\n

Given a string ring that represents the code engraved on the outer ring and another string key that represents the keyword that needs to be spelled, return the minimum number of steps to spell all the characters in the keyword.

\n\n

Initially, the first character of the ring is aligned at the "12:00" direction. You should spell all the characters in key one by one by rotating ring clockwise or anticlockwise to make each character of the string key aligned at the "12:00" direction and then by pressing the center button.

\n\n

At the stage of rotating the ring to spell the key character key[i]:

\n\n
    \n\t
  1. You can rotate the ring clockwise or anticlockwise by one place, which counts as one step. The final purpose of the rotation is to align one of ring's characters at the "12:00" direction, where this character must equal key[i].
    2. \n\t
  2. If the character key[i] has been aligned at the "12:00" direction, press the center button to spell, which also counts as one step. After the pressing, you could begin to spell the next character in the key (next stage). Otherwise, you have finished all the spelling.
    3. \n
\n\n

 

\n

Example 1:

\n\n
\nInput: ring = "godding", key = "gd"\nOutput: 4\nExplanation:\nFor the first key character 'g', since it is already in place, we just need 1 step to spell this character. \nFor the second key character 'd', we need to rotate the ring "godding" anticlockwise by two steps to make it become "ddinggo".\nAlso, we need 1 more step for spelling.\nSo the final output is 4.\n
\n\n

Example 2:

\n\n
\nInput: ring = "godding", key = "godding"\nOutput: 13\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "自由之路", "translatedContent": "

电子游戏“辐射4”中，任务 “通向自由” 要求玩家到达名为 “Freedom Trail Ring” 的金属表盘，并使用表盘拼写特定关键词才能开门。

\n\n

给定一个字符串 ring ，表示刻在外环上的编码；给定另一个字符串 key ，表示需要拼写的关键词。您需要算出能够拼写关键词中所有字符的最少步数。

\n\n

最初，ring 的第一个字符与 12:00 方向对齐。您需要顺时针或逆时针旋转 ring 以使 key 的一个字符在 12:00 方向对齐，然后按下中心按钮，以此逐个拼写完 key 中的所有字符。

\n\n

旋转 ring 拼出 key 字符 key[i] 的阶段中：

\n\n
    \n\t
  1. 您可以将 ring 顺时针或逆时针旋转 一个位置 ，计为1步。旋转的最终目的是将字符串 ring 的一个字符与 12:00 方向对齐，并且这个字符必须等于字符 key[i] 。
    2. \n\t
  2. 如果字符 key[i] 已经对齐到12:00方向，您需要按下中心按钮进行拼写，这也将算作 1 步。按完之后，您可以开始拼写 key 的下一个字符（下一阶段）, 直至完成所有拼写。
    3. \n
\n\n

 

\n\n

示例 1：

\n\n

\n\n
 
\n\n
\n输入: ring = \"godding\", key = \"gd\"\n输出: 4\n解释:\n 对于 key 的第一个字符 'g'，已经在正确的位置, 我们只需要1步来拼写这个字符。 \n 对于 key 的第二个字符 'd'，我们需要逆时针旋转 ring \"godding\" 2步使它变成 \"ddinggo\"。\n 当然, 我们还需要1步进行拼写。\n 因此最终的输出是 4。\n
\n\n

示例 2:

\n\n
\n输入: ring = \"godding\", key = \"godding\"\n输出: 13\n
\n\n

 

\n\n

提示：

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