diff options
Diffstat (limited to 'prolog/problems/lists/count_3/common.py')
| -rw-r--r-- | prolog/problems/lists/count_3/common.py | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/prolog/problems/lists/count_3/common.py b/prolog/problems/lists/count_3/common.py new file mode 100644 index 0000000..583ad6b --- /dev/null +++ b/prolog/problems/lists/count_3/common.py @@ -0,0 +1,15 @@ +id = 120 +group = 'lists' +number = 27 +visible = True +facts = None + +solution = '''\ +count(_, [], 0). +count(X, [X|T], N) :- + count(X, T, NT), + N is NT + 1. +count(X, [Y|T], NT) :- + X \== Y, + count(X, T, NT). +''' |