Program to shuffle string with given indices in Python

Suppose we have a string s and a list of indices ind, they are of same length. The string s will be shuffled such that the character at the position i, moves to indices[i] in the final string. We have to find the final string.

So, if the input is like s = "ktoalak" ind = [0,5,1,6,2,4,3], then the output will be "kolkata"

To solve this, we will follow these steps −

  • fin_str := a list whose size is same as s and fill with 0

  • for each index i and character v in s, do

    • fin_str[ind[i]] := v

  • join each character present in fin_str and return

Example (Python)

Let us see the following implementation to get better understanding −

 Live Demo

def solve(s, ind):
   fin_str = [0] * len(s)
   for i, v in enumerate(s):
      fin_str[ind[i]] = v

   return "".join(fin_str)

s = "ktoalak"
ind = [0,5,1,6,2,4,3]
print(solve(s, ind))


"ktoalak", [0,5,1,7,2,4,3]



Updated on: 17-May-2021


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