LeetCode contest 199 5472. 重新排列字符串 Shuffle String

Table of Contents

一、中文版

二、英文版

三、My answer

四、解题报告


一、中文版

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 0 到 n - 1 形成的一组排列)。

二、英文版

Given a string s and an integer array indices of the same length.

The string s will be shuffled such that the character at the ith position moves to indices[i] in the shuffled string.

Return the shuffled string.

 

Example 1:

Input: s = "codeleet", indices = [4,5,6,7,0,2,1,3]
Output: "leetcode"
Explanation: As shown, "codeleet" becomes "leetcode" after shuffling.

Example 2:

Input: s = "abc", indices = [0,1,2]
Output: "abc"
Explanation: After shuffling, each character remains in its position.

Example 3:

Input: s = "aiohn", indices = [3,1,4,2,0]
Output: "nihao"

Example 4:

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

Example 5:

Input: s = "art", indices = [1,0,2]
Output: "rat"

 

Constraints:

  • s.length == indices.length == n
  • 1 <= n <= 100
  • s contains only lower-case English letters.
  • 0 <= indices[i] < n
  • All values of indices are unique (i.e. indices is a permutation of the integers from 0 to n - 1).

三、My answer

class Solution:
    def restoreString(self, s: str, indices: List[int]) -> str:
        n = len(s)
        result = ['0'] * n
        for i in range(n):
            result[indices[i]] = s[i]

        result_str = ''.join(result)
        return result_str

四、解题报告

数据结构:数组

算法:遍历。需要清楚 indices[i] 是 result 的下标,s[i] 是 result[indices[i]] 的值。

题目特点:字符串 s 和数组 indices 长度相同

 

 

 

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