[LeetCode]#1528. Shuffle String

Environment: Python 3.7

Key technique: zip, sorted

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"

Analysis:

  1. sorted s based on indices.
  2. use zip(*sorted(zip(indices,s)))
  3. output answer

Solution:

class Solution:
def restoreString(self, s, indices):

list1, list2 = zip(*sorted(zip(indices, s)))
ans=''
for i in range(len(s)):
ans+=list2[i]
return ans

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