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1528. 重新排列字符串#

问题描述#

给你一个字符串 s 和一个 长度相同 的整数数组 indices

请你重新排列字符串 s ,其中第 i 个字符需要移动到 indices[i] 指示的位置。

返回重新排列后的字符串。

 

示例 1:

输入:s = "codeleet", indices = [4,5,6,7,0,2,1,3]
输出:"leetcode"
解释:如图所示,"codeleet" 重新排列后变为 "leetcode" 。

示例 2:

输入:s = "abc", indices = [0,1,2]
输出:"abc"
解释:重新排列后,每个字符都还留在原来的位置上。

示例 3:

输入:s = "aiohn", indices = [3,1,4,2,0]
输出:"nihao"

示例 4:

输入:s = "aaiougrt", indices = [4,0,2,6,7,3,1,5]
输出:"arigatou"

示例 5:

输入:s = "art", indices = [1,0,2]
输出:"rat"

 

提示:

  • s.length == indices.length == n
  • 1 <= n <= 100
  • s 仅包含小写英文字母。
  • 0 <= indices[i] < n
  • indices 的所有的值都是唯一的(也就是说,indices 是整数 0n - 1 形成的一组排列)。

解题思路#

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class Solution:
    def restoreString(self, s: str, indices: List[int]) -> str:
        list_s = [""] * len(s)
        for i, x in enumerate(indices):
            list_s[x] = s[i]
        return "".join(list_s)

测试数据
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solution = Solution()

s = "codeleet"
indices = [4, 5, 6, 7, 0, 2, 1, 3]
assert solution.restoreString(s, indices) == "leetcode"

s = "abc"
indices = [0, 1, 2]
assert solution.restoreString(s, indices) == "abc"

s = "aiohn"
indices = [3, 1, 4, 2, 0]
assert solution.restoreString(s, indices) == "nihao"

s = "aaiougrt"
indices = [4, 0, 2, 6, 7, 3, 1, 5]
assert solution.restoreString(s, indices) == "arigatou"

s = "art"
indices = [1, 0, 2]
assert solution.restoreString(s, indices) == "rat"

print("PASS")
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