You are given a 0-indexed circular string array words and a string target. A circular array means that the array's end connects to the array's beginning.
words[i] is words[(i + 1) % n] and the previous element of words[i] is words[(i - 1 + n) % n], where n is the length of words.Starting from startIndex, you can move to either the next word or the previous word with 1 step at a time.
Return the shortest distance needed to reach the string target. If the string target does not exist in words, return -1.
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Example 1:
\n\n\nInput: words = ["hello","i","am","leetcode","hello"], target = "hello", startIndex = 1\nOutput: 1\nExplanation: We start from index 1 and can reach "hello" by\n- moving 3 units to the right to reach index 4.\n- moving 2 units to the left to reach index 4.\n- moving 4 units to the right to reach index 0.\n- moving 1 unit to the left to reach index 0.\nThe shortest distance to reach "hello" is 1.\n\n\n
Example 2:
\n\n\nInput: words = ["a","b","leetcode"], target = "leetcode", startIndex = 0\nOutput: 1\nExplanation: We start from index 0 and can reach "leetcode" by\n- moving 2 units to the right to reach index 3.\n- moving 1 unit to the left to reach index 3.\nThe shortest distance to reach "leetcode" is 1.\n\n
Example 3:
\n\n\nInput: words = ["i","eat","leetcode"], target = "ate", startIndex = 0\nOutput: -1\nExplanation: Since "ate" does not exist in words, we return -1.\n\n\n\n
Constraints:
\n\n1 <= words.length <= 1001 <= words[i].length <= 100words[i] and target consist of only lowercase English letters.0 <= startIndex < words.length给你一个下标从 0 开始的 环形 字符串数组 words 和一个字符串 target 。环形数组 意味着数组首尾相连。
words[i] 的下一个元素是 words[(i + 1) % n] ，而 words[i] 的前一个元素是 words[(i - 1 + n) % n] ，其中 n 是 words 的长度。从 startIndex 开始，你一次可以用 1 步移动到下一个或者前一个单词。
返回到达目标字符串 target 所需的最短距离。如果 words 中不存在字符串 target ，返回 -1 。
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示例 1：
\n\n输入：words = [\"hello\",\"i\",\"am\",\"leetcode\",\"hello\"], target = \"hello\", startIndex = 1\n输出：1\n解释：从下标 1 开始，可以经由以下步骤到达 \"hello\" ：\n- 向右移动 3 个单位，到达下标 4 。\n- 向左移动 2 个单位，到达下标 4 。\n- 向右移动 4 个单位，到达下标 0 。\n- 向左移动 1 个单位，到达下标 0 。\n到达 \"hello\" 的最短距离是 1 。\n\n\n
示例 2：
\n\n输入：words = [\"a\",\"b\",\"leetcode\"], target = \"leetcode\", startIndex = 0\n输出：1\n解释：从下标 0 开始，可以经由以下步骤到达 \"leetcode\" ：\n- 向右移动 2 个单位，到达下标 3 。\n- 向左移动 1 个单位，到达下标 3 。\n到达 \"leetcode\" 的最短距离是 1 。\n\n
示例 3：
\n\n输入：words = [\"i\",\"eat\",\"leetcode\"], target = \"ate\", startIndex = 0\n输出：-1\n解释：因为 words 中不存在字符串 \"ate\" ，所以返回 -1 。\n\n\n
\n\n
提示：
\n\n1 <= words.length <= 1001 <= words[i].length <= 100words[i] 和 target 仅由小写英文字母组成0 <= startIndex < words.length\\u7248\\u672c\\uff1a \\u7f16\\u8bd1\\u65f6\\uff0c\\u5c06\\u4f1a\\u91c7\\u7528 \\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\"],\"java\":[\"Java\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u88ab\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u5305\\u542b Pair \\u7c7b: https:\\/\\/docs.oracle.com\\/javase\\/8\\/javafx\\/api\\/javafx\\/util\\/Pair.html <\\/p>\"],\"python\":[\"Python\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982\\uff1aarray<\\/a>, bisect<\\/a>, collections<\\/a>\\u3002\\u5982\\u679c\\u60a8\\u9700\\u8981\\u4f7f\\u7528\\u5176\\u4ed6\\u5e93\\u51fd\\u6570\\uff0c\\u8bf7\\u81ea\\u884c\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u6ce8\\u610f Python 2.7 \\u5c06\\u57282020\\u5e74\\u540e\\u4e0d\\u518d\\u7ef4\\u62a4<\\/a>\\u3002 \\u5982\\u60f3\\u4f7f\\u7528\\u6700\\u65b0\\u7248\\u7684Python\\uff0c\\u8bf7\\u9009\\u62e9Python 3\\u3002<\\/p>\"],\"c\":[\"C\",\" \\u7248\\u672c\\uff1a \\u7f16\\u8bd1\\u65f6\\uff0c\\u5c06\\u4f1a\\u91c7\\u7528 \\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u5982\\u60f3\\u4f7f\\u7528\\u54c8\\u5e0c\\u8868\\u8fd0\\u7b97, \\u60a8\\u53ef\\u4ee5\\u4f7f\\u7528 uthash<\\/a>\\u3002 \\\"uthash.h\\\"\\u5df2\\u7ecf\\u9ed8\\u8ba4\\u88ab\\u5bfc\\u5165\\u3002\\u8bf7\\u770b\\u5982\\u4e0b\\u793a\\u4f8b:<\\/p>\\r\\n\\r\\n 1. 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\\u6a21\\u5757\\u4e2d\\u63d0\\u4f9b\\uff1ahttps:\\/\\/www.rubydoc.info\\/github\\/kanwei\\/algorithms\\/Algorithms<\\/p>\"],\"swift\":[\"Swift\",\" \\u7248\\u672c\\uff1a \\u6211\\u4eec\\u901a\\u5e38\\u4fdd\\u8bc1\\u66f4\\u65b0\\u5230 Apple\\u653e\\u51fa\\u7684\\u6700\\u65b0\\u7248Swift<\\/a>\\u3002\\u5982\\u679c\\u60a8\\u53d1\\u73b0Swift\\u4e0d\\u662f\\u6700\\u65b0\\u7248\\u7684\\uff0c\\u8bf7\\u8054\\u7cfb\\u6211\\u4eec\\uff01\\u6211\\u4eec\\u5c06\\u5c3d\\u5feb\\u66f4\\u65b0\\u3002<\\/p>\"],\"golang\":[\"Go\",\" \\u7248\\u672c\\uff1a \\u652f\\u6301 https:\\/\\/godoc.org\\/github.com\\/emirpasic\\/gods@v1.18.1<\\/a> \\u7b2c\\u4e09\\u65b9\\u5e93\\u3002<\\/p>\"],\"python3\":[\"Python3\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982array<\\/a>, bisect<\\/a>, collections<\\/a>\\u3002 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