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  1. # permutations => partitions
  2.  
  3. def perm():
  4.     n = 3
  5.     sol = [0] * (n+1)
  6.     def ok(k):
  7.         for i in range(1, k):
  8.             if sol[i] == sol[k]:
  9.                 return 0
  10.         return 1
  11.     def ok(k):
  12.         for i in range(1, k):
  13.             if sol[i] == sol[k]:
  14.                 return 0;
  15.         return 1
  16.     def display():
  17.         for i in range(1, n+1):
  18.             print(sol[i], end = " ")
  19.         print()
  20.     def bkt(k):
  21.         if k == n + 1:
  22.             display()
  23.         else:
  24.             for i in range(1,n+1):
  25.                 sol[k] = i;
  26.                 if ok(k):
  27.                    bkt(k+1)
  28.     bkt(1)
  29. perm()
  30.  
  31. print("-"*5)
  32.  
  33. def main():
  34.     n = 3
  35.     sol = [0] * (n+1)
  36.     def ok(k):
  37.         for i in range(1, k):
  38.             if sol[i] == sol[k]:
  39.                 return 0
  40.         return 1
  41.     def getMax(k):
  42.         max = sol[1]
  43.         for i in range(2, k):
  44.             if sol[i] > max:
  45.                 max = sol[i]
  46.         return max
  47.     def display():
  48.         for i in range(1, n+1):
  49.             print(sol[i], end = " ")
  50.         print()
  51.     def bkt(k):
  52.         if k == n + 1:
  53.             display()
  54.         else:
  55.             for i in range(1,getMax(k)+2):
  56.                 sol[k] = i;
  57.                 bkt(k+1)
  58.     bkt(1)
  59. main()
  60.  
Success #stdin #stdout 0.04s 9612KB
comments (?)
stdin
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Standard input is empty
stdout
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1 2 3 
1 3 2 
2 1 3 
2 3 1 
3 1 2 
3 2 1 
-----
1 1 1 
1 1 2 
1 2 1 
1 2 2 
1 2 3
https://ideone.com/hARXlL
Permutations and partitions recursively
language:
Python 3 (python  3.9.5)
created:
267 days ago
visibility:
secret

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