Encryption Hackerrank Solution

This is the solution for the Encryption problem in the implementation section of the Algorithm domain. In this An English text needs to be encrypted using the following encryption scheme.
First, the spaces are removed from the text. Let L be the length of this text.
Then, characters are written into a grid, whose rows and columns have the following constraints:

⌊L−−√⌋≤rows≤column≤⌈L−−√⌉, where ⌊x⌋ is floor function and ⌈x⌉ is ceil function

Screenshots[Demo]

The Code:

import math
def perform(x,row,col):
 row=int(row)
 col=int(col)
 mat=[['' for i in range(0,col)]for j in range(0,row)]
 str=''
 k=0
 for i in range(0,row):
  for j in range(0,col):
   #print mat
   if(k<len(x)):
    mat[i][j]=x[k]
    k+=1
 k=0
 for i in range(0,col):
  for j in range(0,row):
   str=str+mat[j][k]
  k+=1
  str=str+' '
 print str
   
 
def calc(x):
 row=math.floor(math.sqrt(len(x)));
 col=math.ceil(math.sqrt(len(x)));
 while(1==1):
  if((row*col)>=len(x)):
   break
  elif(row<col):
   row=row+1;
  else:
   col=col+1
 perform(x,row,col)
x=map(str,raw_input());
calc(x)