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73 lines
1.6 KiB
Python
73 lines
1.6 KiB
Python
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from big_ol_pile_of_manim_imports import *
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def print_permutation(index_list):
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n = max(max(index_list), len(index_list))
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for i in range(0,n):
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if index_list[i] > n - i:
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raise Exception("Impossible indices!")
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#print "given index list:", index_list
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perm_list = n * ["_"]
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alphabet = ["A", "B", "C", "D", "E", "F",
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"G", "H", "I", "J", "K", "L",
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"M", "N", "O", "P", "Q", "R",
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"S", "T", "U", "V", "W", "X",
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"Y", "Z"]
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free_indices = range(n)
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free_indices_p1 = range(1,n + 1)
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#print perm_list
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for i in range(n):
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findex = index_list[i] - 1
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#print "place next letter at", findex + 1, "th free place"
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tindex = free_indices[findex]
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#print "so at position", tindex + 1
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perm_list[tindex] = alphabet[i]
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free_indices.remove(tindex)
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free_indices_p1.remove(tindex + 1)
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#print "remaining free places:", free_indices_p1
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#print perm_list
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return "".join(perm_list)
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N = 5
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index_list = []
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for i in range(1, N + 1):
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index_list.append(i)
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for j in range(1, N):
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index_list.append(j)
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for k in range(1, N - 1):
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index_list.append(k)
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for l in range(1, N - 2):
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index_list.append(l)
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for m in range(1, N - 3):
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index_list.append(m)
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print print_permutation(index_list)
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index_list.pop()
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index_list.pop()
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index_list.pop()
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index_list.pop()
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index_list.pop()
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