Updated Exercise -10.4,Earlier it was repeating identical solution muptiple times.

Add a cut at line 109 to terminate repetition.

Author: mohitiitb

chapter-10/exercises.pl

@@ -106,7 +106,7 @@
     directTrain(X, Y).
 
 directPath(X, Y) :-
-    directTrain(Y, X).
+    directTrain(Y, X),!.
 
 %% base case
 route(Y, Y, RevL, L) :-