@@ -0,0 +1,382 @@
+import java.util.List;%0Aimport java.util.Set;%0A%0Aclass Matrix %7B%0A%0A    Matrix(List%3CList%3CInteger%3E%3E values) %7B%0A        throw new UnsupportedOperationException(%22Delete this statement and write your own implementation.%22);%0A    %7D%0A%0A    Set%3CMatrixCoordinate%3E getSaddlePoints() %7B%0A        throw new UnsupportedOperationException(%22Delete this statement and write your own implementation.%22);%0A    %7D%0A%7D%0A

add starter implementation. (#1003)