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author | Aleš Smodiš <aless@guru.si> | 2015-08-18 16:06:19 +0200 |
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committer | Aleš Smodiš <aless@guru.si> | 2015-08-18 16:06:19 +0200 |
commit | 95e2fe57f6e4639f6ae9f1fef368829d5090dbf6 (patch) | |
tree | 462ba05eb0c4732ca1c97739548801258bf47b40 /prolog/problems/lists/permute_2 |
Exported all problems from the SQLite database into the new directory structure.
Diffstat (limited to 'prolog/problems/lists/permute_2')
-rw-r--r-- | prolog/problems/lists/permute_2/common.py | 15 | ||||
-rw-r--r-- | prolog/problems/lists/permute_2/en.py | 17 |
2 files changed, 32 insertions, 0 deletions
diff --git a/prolog/problems/lists/permute_2/common.py b/prolog/problems/lists/permute_2/common.py new file mode 100644 index 0000000..8e0386c --- /dev/null +++ b/prolog/problems/lists/permute_2/common.py @@ -0,0 +1,15 @@ +id = 107 +group = 'lists' +number = 14 +visible = True +facts = None + +solution = '''\ +del107(X, [X|T], T). +del107(X, [Y|T], [Y|L]) :- + del107(X, T, L). +permute([], []). +permute(L, [X|P]) :- + del107(X, L, L1), + permute(L1, P). +''' diff --git a/prolog/problems/lists/permute_2/en.py b/prolog/problems/lists/permute_2/en.py new file mode 100644 index 0000000..8898c83 --- /dev/null +++ b/prolog/problems/lists/permute_2/en.py @@ -0,0 +1,17 @@ +id = 107 +name = 'permute/2' +slug = 'generate permutations of a list' + +description = '''\ +<p><code>permute(L1, L2)</code>: the list <code>L2</code> is a permutation of the elements of the list <code>L1</code>.</p> +<pre> + ?- permute([1,2,3], L). + L = [1,2,3] ; + L = [1,3,2] ; + L = [2,1,3] ; + L = [2,3,1] ; + L = [3,1,2] ; + L = [3,2,1]. +</pre>''' + +hint = {} |