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authorAleš Smodiš <aless@guru.si>2015-08-18 16:06:19 +0200
committerAleš Smodiš <aless@guru.si>2015-08-18 16:06:19 +0200
commit95e2fe57f6e4639f6ae9f1fef368829d5090dbf6 (patch)
tree462ba05eb0c4732ca1c97739548801258bf47b40 /prolog/problems/license_plates/firstminus_2
Exported all problems from the SQLite database into the new directory structure.
Diffstat (limited to 'prolog/problems/license_plates/firstminus_2')
-rw-r--r--prolog/problems/license_plates/firstminus_2/common.py11
-rw-r--r--prolog/problems/license_plates/firstminus_2/en.py13
2 files changed, 24 insertions, 0 deletions
diff --git a/prolog/problems/license_plates/firstminus_2/common.py b/prolog/problems/license_plates/firstminus_2/common.py
new file mode 100644
index 0000000..9e971f6
--- /dev/null
+++ b/prolog/problems/license_plates/firstminus_2/common.py
@@ -0,0 +1,11 @@
+id = 147
+group = 'license_plates'
+number = 54
+visible = True
+facts = None
+
+solution = '''\
+firstMinus(L, L).
+firstMinus([X|T], [Y|T]) :-
+ Y is -X.
+'''
diff --git a/prolog/problems/license_plates/firstminus_2/en.py b/prolog/problems/license_plates/firstminus_2/en.py
new file mode 100644
index 0000000..9fb8c69
--- /dev/null
+++ b/prolog/problems/license_plates/firstminus_2/en.py
@@ -0,0 +1,13 @@
+id = 147
+name = 'firstMinus/2'
+slug = 'negate the first element in a list of numbers'
+
+description = '''\
+<p><code>firstMinus(L1, L2)</code>: the list <code>L2</code> is the same as <code>L1</code>, except for the first element that may be negated. Your code should return both solutions.</p>
+<pre>
+ ?- firstMinus([1,2,3], L).
+ L = [1,2,3] ;
+ L = [-1,2,3].
+</pre>'''
+
+hint = {}