diff options
Diffstat (limited to 'prolog/problems/clp_r/center_3/common.py')
-rw-r--r-- | prolog/problems/clp_r/center_3/common.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/prolog/problems/clp_r/center_3/common.py b/prolog/problems/clp_r/center_3/common.py new file mode 100644 index 0000000..1474ef1 --- /dev/null +++ b/prolog/problems/clp_r/center_3/common.py @@ -0,0 +1,20 @@ +id = 158 +group = 'clp_r' +number = 68 +visible = True +facts = None + +solution = '''\ +memb158(X, [X|_]). +memb158(X, [_|T]) :- + memb158(X, T). + +check158([], _, _). +check158([X/Y | T], R, Xc/Yc) :- + { (X-Xc)*(X-Xc) + (Y-Yc)*(Y-Yc) =< R*R }, + check158(T, R, Xc/Yc). + +center(L, R, Xc/Yc) :- + memb158(Xc/Yc, L), + check158(L, R, Xc/Yc). +''' |