Alice and Bob are playing a game. Initially, Alice has a string word = "a".
You are given a positive integer k. You are also given an integer array operations, where operations[i] represents the type of the ith operation.
Now Bob will ask Alice to perform all operations in sequence:
\n\noperations[i] == 0, append a copy of word to itself.operations[i] == 1, generate a new string by changing each character in word to its next character in the English alphabet, and append it to the original word. For example, performing the operation on "c" generates "cd" and performing the operation on "zb" generates "zbac".Return the value of the kth character in word after performing all the operations.
Note that the character 'z' can be changed to 'a' in the second type of operation.
\n
Example 1:
\n\nInput: k = 5, operations = [0,0,0]
\n\nOutput: "a"
\n\nExplanation:
\n\nInitially, word == "a". Alice performs the three operations as follows:
"a" to "a", word becomes "aa"."aa" to "aa", word becomes "aaaa"."aaaa" to "aaaa", word becomes "aaaaaaaa".Example 2:
\n\nInput: k = 10, operations = [0,1,0,1]
\n\nOutput: "b"
\n\nExplanation:
\n\nInitially, word == "a". Alice performs the four operations as follows:
"a" to "a", word becomes "aa"."bb" to "aa", word becomes "aabb"."aabb" to "aabb", word becomes "aabbaabb"."bbccbbcc" to "aabbaabb", word becomes "aabbaabbbbccbbcc".\n
Constraints:
\n\n1 <= k <= 10141 <= operations.length <= 100operations[i] is either 0 or 1.word has at least k characters after all operations.Alice 和 Bob 正在玩一个游戏。最初，Alice 有一个字符串 word = \"a\"。
给定一个正整数 k 和一个整数数组 operations，其中 operations[i] 表示第 i 次操作的类型。
现在 Bob 将要求 Alice 按顺序执行 所有 操作：
\n\noperations[i] == 0，将 word 的一份 副本追加 到它自身。operations[i] == 1，将 word 中的每个字符 更改 为英文字母表中的 下一个 字符来生成一个新字符串，并将其 追加 到原始的 word。例如，对 \"c\" 进行操作生成 \"cd\"，对 \"zb\" 进行操作生成 \"zbac\"。在执行所有操作后，返回 word 中第 k 个字符的值。
注意，在第二种类型的操作中，字符 'z' 可以变成 'a'。
\n\n
示例 1:
\n\n输入：k = 5, operations = [0,0,0]
\n\n输出：\"a\"
\n\n解释：
\n\n最初，word == \"a\"。Alice 按以下方式执行三次操作：
\"a\" 附加到 \"a\"，word 变为 \"aa\"。\"aa\" 附加到 \"aa\"，word 变为 \"aaaa\"。\"aaaa\" 附加到 \"aaaa\"，word 变为 \"aaaaaaaa\"。示例 2:
\n\n输入：k = 10, operations = [0,1,0,1]
\n\n输出：\"b\"
\n\n解释：
\n\n最初，word == \"a\"。Alice 按以下方式执行四次操作：
\"a\" 附加到 \"a\"，word 变为 \"aa\"。\"bb\" 附加到 \"aa\"，word 变为 \"aabb\"。\"aabb\" 附加到 \"aabb\"，word 变为 \"aabbaabb\"。\"bbccbbcc\" 附加到 \"aabbaabb\"，word 变为 \"aabbaabbbbccbbcc\"。\n\n
提示：
\n\n1 <= k <= 10141 <= operations.length <= 100operations[i] 可以是 0 或 1。word 至少有 k 个字符。kth character was part of.",
"The kth character is only affected if it is present in the first half of the string."
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