C: pythagorean-triplet and saddle-point

c/saddle-points/README.md

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+# Saddle Points
+
+Detect saddle points in a matrix.
+
+So say you have a matrix like so:
+
+```text
+    1  2  3
+  |---------
+1 | 9  8  7
+2 | 5  3  2     <--- saddle point at column 1, row 2, with value 5
+3 | 6  6  7
+```
+
+It has a saddle point at column 1, row 2.
+
+It's called a "saddle point" because it is greater than or equal to
+every element in its row and less than or equal to every element in
+its column.
+
+A matrix may have zero or more saddle points.
+
+Your code should be able to provide the (possibly empty) list of all the
+saddle points for any given matrix.
+
+The matrix can have a different number of rows and columns (Non square).
+
+Note that you may find other definitions of matrix saddle points online,
+but the tests for this exercise follow the above unambiguous definition.
+
+## Getting Started
+
+Make sure you have read the "Guides" section of the
+[C track][c-track] on the Exercism site. This covers
+the basic information on setting up the development environment expected
+by the exercises.
+
+## Passing the Tests
+
+Get the first test compiling, linking and passing by following the [three
+rules of test-driven development][3-tdd-rules].
+
+The included makefile can be used to create and run the tests using the `test`
+task.
+
+    make test
+
+Create just the functions you need to satisfy any compiler errors and get the
+test to fail. Then write just enough code to get the test to pass. Once you've
+done that, move onto the next test.
+
+As you progress through the tests, take the time to refactor your
+implementation for readability and expressiveness and then go on to the next
+test.
+
+Try to use standard C99 facilities in preference to writing your own
+low-level algorithms or facilities by hand.
+
+## Source
+
+J Dalbey's Programming Practice problems [http://users.csc.calpoly.edu/~jdalbey/103/Projects/ProgrammingPractice.html](http://users.csc.calpoly.edu/~jdalbey/103/Projects/ProgrammingPractice.html)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.
+
+[c-track]: https://exercism.io/my/tracks/c
+[3-tdd-rules]: http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd