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  1. f=lambda s,r='',c='':f(s[1:],*{'B':(r[:-1],c),'C':(r,r),'D':('',c),'P':(r+c,c),'':(r+s[0],c)}[s[0][1:2]])if s else r
  2.  
  3. tests = [
  4. 	['H', 'e', 'l', 'l', 'o'],
  5. 	['H', 'e', 'l', 'l', 'o', ' ', '[C]', '[P]'],
  6. 	['[D]', 'D', '[B]'],
  7. 	[''],
  8. 	['e', '[C]', '[B]', 'I', ' ', 'l', 'i', 'k', '[P]', ' ', 'b', '[P]', '[P]', 's', '!'],
  9. 	['N', '[P]'],
  10. 	['#', '5', '0', 'K', '0', '0', '1', '[D]', '#', 'n', 'o', 't']]
  11. note = '* Note: output is repr(f(input)), to quote the string for clarity *'
  12. border1  = '*'*len(note)+'\n'
  13. border2 = '*'+' '*(len(note)-2)+'*'+'\n'
  14. print border1+border2+note+'\n'+border2+border1
  15. for test in tests:
  16. 	print 'Input:', test
  17. 	print 'Output:', repr(f(test))
  18. 	print ''
Success #stdin #stdout 0.01s 9024KB
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Standard input is empty
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*******************************************************************
*                                                                 *
* Note: output is repr(f(input)), to quote the string for clarity *
*                                                                 *
*******************************************************************

Input: ['H', 'e', 'l', 'l', 'o']
Output: 'Hello'

Input: ['H', 'e', 'l', 'l', 'o', ' ', '[C]', '[P]']
Output: 'Hello Hello '

Input: ['[D]', 'D', '[B]']
Output: ''

Input: ['']
Output: ''

Input: ['e', '[C]', '[B]', 'I', ' ', 'l', 'i', 'k', '[P]', ' ', 'b', '[P]', '[P]', 's', '!']
Output: 'I like bees!'

Input: ['N', '[P]']
Output: 'N'

Input: ['#', '5', '0', 'K', '0', '0', '1', '[D]', '#', 'n', 'o', 't']
Output: '#not'
https://ideone.com/bijrJb
language:
Python (cpython 2.7.16)
created:
7 years ago
visibility:
public

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